Python matplotlib.pyplot.plot_date() Examples
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code examples of matplotlib.pyplot.plot_date().
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Example #1
Source File: visualizer.py From Load-Forecasting with MIT License | 6 votes |
def comparisonPlot(year,month,day,seriesList,nameList,plotName="Comparison of Values over Time", yAxisName="Predicted"): date = datetime.date(year,month,day) dateList = [] for x in range(len(seriesList[0])): dateList.append(date+datetime.timedelta(days=x)) colors = ["b","g","r","c","m","y","k","w"] currColor = 0 legendVars = [] for i in range(len(seriesList)): x, = plt.plot_date(x=dateList,y=seriesList[i],color=colors[currColor],linestyle="-",marker=".") legendVars.append(x) currColor += 1 if (currColor >= len(colors)): currColor = 0 plt.legend(legendVars, nameList) plt.title(plotName) plt.ylabel(yAxisName) plt.xlabel("Date") plt.show()
Example #2
Source File: QCreport.py From geoist with MIT License | 6 votes |
def graph_event_types(catalog, prefix): """Graph number of cumulative events by type of event.""" typedict = {} for evtype in catalog['type'].unique(): typedict[evtype] = (catalog['type'] == evtype).cumsum() plt.figure(figsize=(12, 6)) for evtype in typedict: plt.plot_date(catalog['convtime'], typedict[evtype], marker=None, linestyle='-', label=evtype) plt.yscale('log') plt.legend() plt.xlim(min(catalog['convtime']), max(catalog['convtime'])) plt.xlabel('Date', fontsize=14) plt.ylabel('Cumulative number of events', fontsize=14) plt.title('Cumulative Event Type', fontsize=20) plt.savefig('%s_cumuleventtypes.png' % prefix, dpi=300) plt.close()
Example #3
Source File: DailyDifferenceAverageSpark.py From incubator-sdap-nexus with Apache License 2.0 | 6 votes |
def toImage(self): from StringIO import StringIO import matplotlib.pyplot as plt from matplotlib.dates import date2num times = [date2num(datetime.fromtimestamp(dayavglistdict[0]['time'], pytz.utc).date()) for dayavglistdict in self.results()] means = [dayavglistdict[0]['mean'] for dayavglistdict in self.results()] plt.plot_date(times, means, '|g-') plt.xlabel('Date') plt.xticks(rotation=70) plt.ylabel(u'Difference from 5-Day mean (\u00B0C)') plt.title('Sea Surface Temperature (SST) Anomalies') plt.grid(True) plt.tight_layout() sio = StringIO() plt.savefig(sio, format='png') return sio.getvalue()
Example #4
Source File: QCreport.py From geoist with MIT License | 6 votes |
def graph_mag_time(catalog, prefix): """Plot magnitudes vs. origin time.""" catalog = catalog[pd.notnull(catalog['mag'])] times = catalog['convtime'].copy() mags = catalog['mag'].copy() plt.figure(figsize=(10, 6)) plt.xlabel('Date', fontsize=14) plt.ylabel('Magnitude', fontsize=14) plt.plot_date(times, mags, alpha=0.7, markersize=2, c='b') plt.xlim(min(times), max(times)) plt.title('Magnitude vs. Time', fontsize=20) plt.savefig('%s_magvtime.png' % prefix, dpi=300) plt.close()
Example #5
Source File: test_axes.py From twitter-stock-recommendation with MIT License | 5 votes |
def test_date_timezone_x_and_y(): # Tests issue 5575 time_index = [pytz.timezone('UTC').localize(datetime.datetime( year=2016, month=2, day=22, hour=x)) for x in range(3)] # Same Timezone fig = plt.figure(figsize=(20, 12)) plt.subplot(2, 1, 1) plt.plot_date(time_index, time_index, tz='UTC', ydate=True) # Different Timezone plt.subplot(2, 1, 2) plt.plot_date(time_index, time_index, tz='US/Eastern', ydate=True)
Example #6
Source File: ch_591_water_balance.py From hydrology with GNU General Public License v3.0 | 5 votes |
def plot_date(dataframe, column_name): """ :param dataframe: :param column_name: :type column_name:str :return: """ fig = plt.figure(figsize=(11.69, 8.27)) p = plt.plot(dataframe.index, dataframe[column_name], 'b-', label=r"%s" % column_name) plt.hlines(0, min(dataframe.index), max(dataframe.index), 'r') plt.legend(loc='best') fig.autofmt_xdate(rotation=90) return p
Example #7
Source File: test_axes.py From twitter-stock-recommendation with MIT License | 5 votes |
def test_date_timezone_y(): # Tests issue 5575 time_index = [pytz.timezone('Canada/Eastern').localize(datetime.datetime( year=2016, month=2, day=22, hour=x)) for x in range(3)] # Same Timezone fig = plt.figure(figsize=(20, 12)) plt.subplot(2, 1, 1) plt.plot_date([3] * 3, time_index, tz='Canada/Eastern', xdate=False, ydate=True) # Different Timezone plt.subplot(2, 1, 2) plt.plot_date([3] * 3, time_index, tz='UTC', xdate=False, ydate=True)
Example #8
Source File: test_axes.py From twitter-stock-recommendation with MIT License | 5 votes |
def test_date_timezone_x(): # Tests issue 5575 time_index = [pytz.timezone('Canada/Eastern').localize(datetime.datetime( year=2016, month=2, day=22, hour=x)) for x in range(3)] # Same Timezone fig = plt.figure(figsize=(20, 12)) plt.subplot(2, 1, 1) plt.plot_date(time_index, [3] * 3, tz='Canada/Eastern') # Different Timezone plt.subplot(2, 1, 2) plt.plot_date(time_index, [3] * 3, tz='UTC')
Example #9
Source File: test_axes.py From twitter-stock-recommendation with MIT License | 5 votes |
def test_single_date(): time1 = [721964.0] data1 = [-65.54] fig = plt.figure() plt.subplot(211) plt.plot_date(time1, data1, 'o', color='r') plt.subplot(212) plt.plot(time1, data1, 'o', color='r')
Example #10
Source File: log_analyzer.py From satellite with GNU General Public License v3.0 | 5 votes |
def _plot_dvb(ds, ds_name): keys = list(ds[0].keys()) keys.remove("time") keys.remove("date") formatter = DateFormatter('%H:%M') path = os.path.join("figs", ds_name) if not os.path.isdir(path): os.makedirs(path) for key in keys: print("Plotting {}".format(key)) x = [r[key] for r in ds if key in r] t = [r["date"] for r in ds if key in r] n = os.path.join(path, "dvb-" + key.replace("/","_") + ".png") if "_" in key: kelems = key.split("_") ylabel = "{} ({})".format(kelems[0], kelems[1]) elif key[-1] == "%": ylabel = "{} %".format(key[:-1]) else: ylabel = key fig, ax = plt.subplots() plt.plot_date(t, x, ms=1) plt.ylabel(ylabel) plt.xlabel("Time") if (key == "postBER"): ax.set_yscale('log') plt.grid() ax.xaxis.set_major_formatter(formatter) ax.xaxis.set_tick_params(rotation=30, labelsize=10) plt.tight_layout() plt.savefig(n, dpi=300) plt.close()
Example #11
Source File: graph.py From Quant_stock with MIT License | 5 votes |
def graph(models): for model in models: print("Loading pre-trained model...") sess = tf.Session() saver = tf.train.import_meta_graph("data/model/"+str(model)+'/'+str(model)+'.ckpt.meta') saver.restore(sess, tf.train.latest_checkpoint('data/model/'+str(model))) print("Model loaded...") graph = tf.get_default_graph() if model == 'feedforward': x = graph.get_tensor_by_name('input:0') prediction = graph.get_tensor_by_name('output:0') elif model == 'recurrent': x = graph.get_tensor_by_name('input_recurrent:0') prediction = graph.get_tensor_by_name('output_recurrent:0') _, _, _, _, oil_price, stock_price = dp.create_data() predictions = [] if model == 'feedforward': date_labels = oil_price.index date_labels = matplotlib.dates.date2num(date_labels.to_pydatetime()) for i in oil_price: predictions.append(sess.run(prediction, feed_dict={x: [[i]]})[0][0]) elif model == 'recurrent': predictions = [] for index in range(int(len(oil_price.values) / total_chunk_size)): x_in = oil_price.values[index * total_chunk_size:index * total_chunk_size + total_chunk_size].reshape( (1, n_chunks, chunk_size)) predictions += sess.run(prediction, feed_dict={x: x_in})[0].reshape(total_chunk_size).tolist() plt.plot_date(date_labels, predictions, 'b-', label="Feedforward Predictions") plt.plot_date(date_labels, stock_price.values, 'r-', label='Stock Prices') plt.legend() plt.ylabel('Price') plt.xlabel('Year') plt.show()
Example #12
Source File: test_axes.py From coffeegrindsize with MIT License | 5 votes |
def test_date_timezone_x_and_y(): # Tests issue 5575 UTC = datetime.timezone.utc time_index = [datetime.datetime(2016, 2, 22, hour=x, tzinfo=UTC) for x in range(3)] # Same Timezone fig = plt.figure(figsize=(20, 12)) plt.subplot(2, 1, 1) plt.plot_date(time_index, time_index, tz='UTC', ydate=True) # Different Timezone plt.subplot(2, 1, 2) plt.plot_date(time_index, time_index, tz='US/Eastern', ydate=True)
Example #13
Source File: test_axes.py From coffeegrindsize with MIT License | 5 votes |
def test_date_timezone_y(): # Tests issue 5575 time_index = [datetime.datetime(2016, 2, 22, hour=x, tzinfo=dutz.gettz('Canada/Eastern')) for x in range(3)] # Same Timezone fig = plt.figure(figsize=(20, 12)) plt.subplot(2, 1, 1) plt.plot_date([3] * 3, time_index, tz='Canada/Eastern', xdate=False, ydate=True) # Different Timezone plt.subplot(2, 1, 2) plt.plot_date([3] * 3, time_index, tz='UTC', xdate=False, ydate=True)
Example #14
Source File: test_axes.py From coffeegrindsize with MIT License | 5 votes |
def test_date_timezone_x(): # Tests issue 5575 time_index = [datetime.datetime(2016, 2, 22, hour=x, tzinfo=dutz.gettz('Canada/Eastern')) for x in range(3)] # Same Timezone fig = plt.figure(figsize=(20, 12)) plt.subplot(2, 1, 1) plt.plot_date(time_index, [3] * 3, tz='Canada/Eastern') # Different Timezone plt.subplot(2, 1, 2) plt.plot_date(time_index, [3] * 3, tz='UTC')
Example #15
Source File: test_axes.py From coffeegrindsize with MIT License | 5 votes |
def test_single_date(): time1 = [721964.0] data1 = [-65.54] fig = plt.figure() plt.subplot(211) plt.plot_date(time1, data1, 'o', color='r') plt.subplot(212) plt.plot(time1, data1, 'o', color='r')
Example #16
Source File: test_axes.py From ImageFusion with MIT License | 5 votes |
def test_single_date(): time1 = [721964.0] data1 = [-65.54] fig = plt.figure() plt.subplot(211) plt.plot_date(time1, data1, 'o', color='r') plt.subplot(212) plt.plot(time1, data1, 'o', color='r')
Example #17
Source File: visualizer.py From Load-Forecasting with MIT License | 5 votes |
def yearlyPlot(ySeries,year,month,day,plotName ="Plot",yAxisName="yData"): date = datetime.date(year,month,day) dateList = [] for x in range(len(ySeries)): dateList.append(date+datetime.timedelta(days=x)) plt.plot_date(x=dateList,y=ySeries,fmt="r-") plt.title(plotName) plt.ylabel(yAxisName) plt.xlabel("Date") plt.grid(True) plt.show() # Plots autocorrelation factors against varying time lags for ySeries
Example #18
Source File: temperature_data.py From python_primer with MIT License | 5 votes |
def plot_city_data(*city_data_dicts): cities = [] for city_data in city_data_dicts: cities.append(city_data['name']) plt.plot_date(city_data['date'], city_data['temperature'], '.') plt.ylabel('Temperature (C)') plt.xlabel('Date') plt.ylim([0, 110]) plt.legend(cities) plt.show()
Example #19
Source File: display.py From diogenes with MIT License | 5 votes |
def plot_on_timeline(col, verbose=True): """Plots points on a timeline Parameters ---------- col : np.array verbose : boolean iff True, display the graph Returns ------- matplotlib.figure.Figure Figure containing plot Returns ------- matplotlib.figure.Figure """ col = utils.check_col(col) # http://stackoverflow.com/questions/1574088/plotting-time-in-python-with-matplotlib if is_nd(col): col = col.astype(datetime) dates = matplotlib.dates.date2num(col) fig = plt.figure() plt.plot_date(dates, [0] * len(dates)) if verbose: plt.show() return fig
Example #20
Source File: test_axes.py From python3_ios with BSD 3-Clause "New" or "Revised" License | 5 votes |
def test_date_timezone_x_and_y(): # Tests issue 5575 UTC = datetime.timezone.utc time_index = [datetime.datetime(2016, 2, 22, hour=x, tzinfo=UTC) for x in range(3)] # Same Timezone fig = plt.figure(figsize=(20, 12)) plt.subplot(2, 1, 1) plt.plot_date(time_index, time_index, tz='UTC', ydate=True) # Different Timezone plt.subplot(2, 1, 2) plt.plot_date(time_index, time_index, tz='US/Eastern', ydate=True)
Example #21
Source File: test_axes.py From python3_ios with BSD 3-Clause "New" or "Revised" License | 5 votes |
def test_date_timezone_y(): # Tests issue 5575 time_index = [datetime.datetime(2016, 2, 22, hour=x, tzinfo=dutz.gettz('Canada/Eastern')) for x in range(3)] # Same Timezone fig = plt.figure(figsize=(20, 12)) plt.subplot(2, 1, 1) plt.plot_date([3] * 3, time_index, tz='Canada/Eastern', xdate=False, ydate=True) # Different Timezone plt.subplot(2, 1, 2) plt.plot_date([3] * 3, time_index, tz='UTC', xdate=False, ydate=True)
Example #22
Source File: test_axes.py From python3_ios with BSD 3-Clause "New" or "Revised" License | 5 votes |
def test_date_timezone_x(): # Tests issue 5575 time_index = [datetime.datetime(2016, 2, 22, hour=x, tzinfo=dutz.gettz('Canada/Eastern')) for x in range(3)] # Same Timezone fig = plt.figure(figsize=(20, 12)) plt.subplot(2, 1, 1) plt.plot_date(time_index, [3] * 3, tz='Canada/Eastern') # Different Timezone plt.subplot(2, 1, 2) plt.plot_date(time_index, [3] * 3, tz='UTC')
Example #23
Source File: test_axes.py From python3_ios with BSD 3-Clause "New" or "Revised" License | 5 votes |
def test_single_date(): time1 = [721964.0] data1 = [-65.54] fig = plt.figure() plt.subplot(211) plt.plot_date(time1, data1, 'o', color='r') plt.subplot(212) plt.plot(time1, data1, 'o', color='r')
Example #24
Source File: process_debug.py From scoop with GNU Lesser General Public License v3.0 | 5 votes |
def plotBrokerQueue(dataTask, filename): """Generates the broker queue length graphic.""" print("Plotting broker queue length for {0}.".format(filename)) plt.figure() # Queue length plt.subplot(211) for fichier, vals in dataTask.items(): if type(vals) == list: timestamps = list(map(datetime.fromtimestamp, map(int, list(zip(*vals))[0]))) # Data is from broker plt.plot_date(timestamps, list(zip(*vals))[2], linewidth=1.0, marker='o', markersize=2, label=fichier) plt.title('Broker queue length') plt.ylabel('Tasks') # Requests received plt.subplot(212) for fichier, vals in dataTask.items(): if type(vals) == list: timestamps = list(map(datetime.fromtimestamp, map(int, list(zip(*vals))[0]))) # Data is from broker plt.plot_date(timestamps, list(zip(*vals))[3], linewidth=1.0, marker='o', markersize=2, label=fichier) plt.title('Broker pending requests') plt.xlabel('time (s)') plt.ylabel('Requests') plt.savefig(filename)
Example #25
Source File: plot.py From quantified-self with MIT License | 5 votes |
def make_efficiency_date( total_data, avg_data, f_name, title=None, x_label=None, y_label=None, x_ticks=None, y_ticks=None, ): fig = plt.figure() if title is not None: plt.title(title, fontsize=16) if x_label is not None: plt.ylabel(x_label) if y_label is not None: plt.xlabel(y_label) v_date = [] v_val = [] for data in total_data: dates = dt.date2num(datetime.datetime.strptime(data[0], "%H:%M")) to_int = round(float(data[1])) plt.plot_date(dates, data[1], color=plt.cm.brg(to_int)) for data in avg_data: dates = dt.date2num(datetime.datetime.strptime(data[0], "%H:%M")) v_date.append(dates) v_val.append(data[1]) plt.plot_date(v_date, v_val, "^y-", label="Average") plt.legend() plt.savefig(f_name) plt.close(fig)
Example #26
Source File: test_axes.py From neural-network-animation with MIT License | 5 votes |
def test_single_date(): time1 = [721964.0] data1 = [-65.54] fig = plt.figure() plt.subplot(211) plt.plot_date(time1, data1, 'o', color='r') plt.subplot(212) plt.plot(time1, data1, 'o', color='r')
Example #27
Source File: DailyDifferenceAverage.py From incubator-sdap-nexus with Apache License 2.0 | 4 votes |
def calc(self, request, **args): min_lat, max_lat, min_lon, max_lon = request.get_min_lat(), request.get_max_lat(), request.get_min_lon(), request.get_max_lon() dataset1 = request.get_argument("ds1", None) dataset2 = request.get_argument("ds2", None) start_time = request.get_start_time() end_time = request.get_end_time() simple = request.get_argument("simple", None) is not None averagebyday = self.get_daily_difference_average_for_box(min_lat, max_lat, min_lon, max_lon, dataset1, dataset2, start_time, end_time) averagebyday = sorted(averagebyday, key=lambda dayavg: dayavg[0]) if simple: import matplotlib.pyplot as plt from matplotlib.dates import date2num times = [date2num(self.date_from_ms(dayavg[0])) for dayavg in averagebyday] means = [dayavg[1] for dayavg in averagebyday] plt.plot_date(times, means, ls='solid') plt.xlabel('Date') plt.xticks(rotation=70) plt.ylabel(u'Difference from 5-Day mean (\u00B0C)') plt.title('Sea Surface Temperature (SST) Anomalies') plt.grid(True) plt.tight_layout() plt.savefig("test.png") return averagebyday, None, None else: result = NexusResults( results=[[{'time': dayms, 'mean': avg, 'ds': 0}] for dayms, avg in averagebyday], stats={}, meta=self.get_meta()) result.extendMeta(min_lat, max_lat, min_lon, max_lon, "", start_time, end_time) result.meta()['label'] = u'Difference from 5-Day mean (\u00B0C)' return result
Example #28
Source File: todaychart.py From raspi-sump with MIT License | 4 votes |
def graph(csv_file, filename, bytes2str): """Create a line graph from a two column csv file.""" unit = configs["unit"] date, value = np.loadtxt( csv_file, delimiter=",", unpack=True, converters={0: bytes2str} ) fig = plt.figure(figsize=(10, 3.5)) # axisbg is deprecated in matplotlib 2.x. Maintain 1.x compatibility if MPL_VERSION > 1: fig.add_subplot(111, facecolor="white", frameon=False) else: fig.add_subplot(111, axisbg="white", frameon=False) rcParams.update({"font.size": 9}) plt.plot_date( x=date, y=value, ls="solid", linewidth=2, color="#" + configs["line_color"], fmt=":", ) title = "Sump Pit Water Level {}".format(time.strftime("%Y-%m-%d %H:%M")) title_set = plt.title(title) title_set.set_y(1.09) plt.subplots_adjust(top=0.86) if unit == "imperial": plt.ylabel("inches") if unit == "metric": plt.ylabel("centimeters") plt.xlabel("Time of Day") plt.xticks(rotation=30) plt.grid(True, color="#ECE5DE", linestyle="solid") if MPL_VERSION < 3: plt.tick_params(axis="x", bottom="off", top="off") plt.tick_params(axis="y", left="off", right="off") else: plt.tick_params(axis="x", bottom=False, top=False) plt.tick_params(axis="y", left=False, right=False) plt.savefig(filename, dpi=72)
Example #29
Source File: feedforward_nn.py From Quant_stock with MIT License | 4 votes |
def feedforward_neural_network(inputs): x = tf.placeholder('float', name='input') oil_train, stock_train, oil_test, stock_test, oil_price, stock_price = inputs prediction = neural_network_model(x) cost = tf.reduce_mean(tf.square(tf.transpose(prediction)-y)) optimizer = tf.train.AdamOptimizer(learning_rate).minimize(cost) #oil_train, stock_train, oil_test, stock_test = inputs oil_train, stock_train, oil_test, stock_test = refine_input_with_lag(oil_train, stock_train, oil_test, stock_test) saver = tf.train.Saver() with tf.Session() as sess: sess.run(tf.global_variables_initializer()) #Running neural net for epoch in range(hm_epoch): epoch_loss = 0 for (X, Y) in zip(oil_train.values, stock_train.values): _, c = sess.run([optimizer, cost], feed_dict={x: [[X]], y: [[Y]]}) epoch_loss += c print('Epoch', epoch, 'completed out of', hm_epoch, 'loss:', epoch_loss) correct = tf.subtract(prediction, y) total = 0 cor = 0 for (X,Y) in zip(oil_test.values, stock_test.values): total += 1 if abs(correct.eval({x: [[X]], y: [[Y]]})) < 5: cor += 1 print('Accuracy:', cor/total) save_path = saver.save(sess, "data/model/feedforward/feedforward.ckpt") print("Model saved in file: %s" % save_path) date_labels = oil_price.index date_labels = matplotlib.dates.date2num(date_labels.to_pydatetime()) predictions = [] for i in oil_price: predictions.append(sess.run(prediction, feed_dict={x: [[i]]})[0][0]) plt.plot_date(date_labels, predictions, 'b-', label="Feedforward Predictions") plt.plot_date(date_labels, stock_price.values, 'r-', label='Stock Prices') plt.legend() plt.ylabel('Price') plt.xlabel('Year') plt.show()
Example #30
Source File: recurrent_lstm.py From Quant_stock with MIT License | 4 votes |
def recurrent_neural_network(inputs): oil_train, stock_train, oil_test, stock_test, oil_price, stock_price = inputs cost = tf.reduce_mean(tf.square(prediction-y)) optimizer = tf.train.AdamOptimizer(learning_rate).minimize(cost) #oil_train, stock_train, oil_test, stock_test = inputs oil_train, stock_train, oil_test, stock_test = refine_input_with_lag(oil_train, stock_train, oil_test, stock_test) with tf.Session() as sess: sess.run(tf.global_variables_initializer()) #Running neural net for epoch in range(hm_epoch): epoch_loss = 0 for index in range(int(len(oil_train.values) / total_chunk_size)): x_in = oil_train.values[index * total_chunk_size:index * total_chunk_size + total_chunk_size].reshape((1, n_chunks, chunk_size)) y_in = stock_train.values[index * total_chunk_size:index * total_chunk_size + total_chunk_size].reshape((1, n_chunks, chunk_size)) _, c = sess.run([optimizer, cost], feed_dict={x: x_in, y: y_in}) epoch_loss += c print('Epoch', epoch, 'completed out of', hm_epoch, 'loss:', epoch_loss) correct = tf.reduce_mean(tf.square(tf.subtract(prediction, y))) total = 0 cor = 0 for index in range(int(len(oil_test.values) / total_chunk_size)): x_in = oil_test.values[index * total_chunk_size:index * total_chunk_size + total_chunk_size].reshape((1, n_chunks, chunk_size)) y_in = stock_test.values[index * total_chunk_size:index * total_chunk_size + total_chunk_size].reshape((1, n_chunks, chunk_size)) total += total_chunk_size if abs(correct.eval(feed_dict={x: x_in, y: y_in})) < 5: cor += total_chunk_size saver = tf.train.Saver() print('Accuracy:', cor/total) save_path = saver.save(sess, "data/model/recurrent/recurrent.ckpt") print("Model saved in file: %s" % save_path) date_labels = oil_price.index date_labels = matplotlib.dates.date2num(date_labels.to_pydatetime())[:-4] predictions = [] for index in range(int(len(oil_price.values) / total_chunk_size)): x_in = oil_price.values[index * total_chunk_size:index * total_chunk_size + total_chunk_size].reshape((1, n_chunks, chunk_size)) predictions += sess.run(prediction, feed_dict={x: x_in})[0].reshape(total_chunk_size).tolist() print(len(predictions), len(date_labels)) plt.plot_date(date_labels, predictions, 'b-', label="RNN Predictions") plt.plot_date(date_labels, stock_price.values[:-4], 'r-', label='Stock Prices') plt.legend() plt.ylabel('Price') plt.xlabel('Year') plt.show()