Java Code Examples for java.io.RandomAccessFile#readFloat()
The following examples show how to use
java.io.RandomAccessFile#readFloat() .
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Example 1
| Source File: MM5DataInfo.java From MeteoInfo with GNU Lesser General Public License v3.0 | 5 votes |
|
/**
* Read big header
*
* @param br The randomAccessFile
* @param isSequential If is sequential
* @return The big header
* @throws IOException
*/
public BigHeader readBigHeader(RandomAccessFile br, boolean isSequential) throws IOException {
BigHeader bh = new BigHeader();
if (isSequential) {
br.skipBytes(4);
}
byte[] bytes = new byte[80];
int i, j;
for (i = 0; i < 20; i++) {
for (j = 0; j < 50; j++) {
bh.bhi[j][i] = br.readInt();
}
}
for (i = 0; i < 20; i++) {
for (j = 0; j < 20; j++) {
bh.bhr[j][i] = br.readFloat();
}
}
for (i = 0; i < 20; i++) {
for (j = 0; j < 50; j++) {
br.read(bytes);
bh.bhic[j][i] = new String(bytes).trim();
}
}
for (i = 0; i < 20; i++) {
for (j = 0; j < 20; j++) {
br.read(bytes);
bh.bhrc[j][i] = new String(bytes).trim();
}
}
if (isSequential) {
br.skipBytes(4);
}
return bh;
}
Example 2
| Source File: MM5DataInfo.java From MeteoInfo with GNU Lesser General Public License v3.0 | 5 votes |
|
/**
* Read sub header
*
* @param br The randomAccessFile
* @param isSequential If if sequential
* @return The sub header
* @throws IOException
*/
public SubHeader readSubHeader(RandomAccessFile br, boolean isSequential) throws IOException {
SubHeader sh = new SubHeader();
byte[] bytes = new byte[4];
int i;
if (isSequential) {
br.skipBytes(4);
}
sh.ndim = br.readInt();
for (i = 0; i < 4; i++) {
sh.start_index[i] = br.readInt();
}
for (i = 0; i < 4; i++) {
sh.end_index[i] = br.readInt();
}
sh.xtime = br.readFloat();
br.read(bytes);
sh.staggering = new String(bytes).trim();
br.read(bytes);
sh.ordering = new String(bytes).trim();
bytes = new byte[24];
br.read(bytes);
sh.current_date = new String(bytes).trim();
bytes = new byte[9];
br.read(bytes);
sh.name = new String(bytes).trim();
bytes = new byte[25];
br.read(bytes);
sh.unit = new String(bytes).trim();
bytes = new byte[46];
br.read(bytes);
sh.description = new String(bytes).trim();
if (isSequential) {
br.skipBytes(4);
}
return sh;
}
Example 3
| Source File: HYSPLITPartDataInfo.java From MeteoInfo with GNU Lesser General Public License v3.0 | 4 votes |
|
/**
* Read array data of the variable
*
* @param varName Variable name
* @param origin The origin array
* @param size The size array
* @param stride The stride array
* @return Array data
*/
@Override
public Array read(String varName, int[] origin, int[] size, int[] stride) {
try {
Variable var = this.getVariable(varName);
int timeIdx = (int)var.findAttribute("time_index").getNumericValue();
int particleNum = _parameters.get(timeIdx).get(0);
int pollutantNum = _parameters.get(timeIdx).get(1);
int pos = _parameters.get(timeIdx).get(2);
Array r = Array.factory(var.getDataType(), new int[]{particleNum});
RandomAccessFile br = new RandomAccessFile(this.getFileName(), "r");
int i, j;
float lon, lat, alt;
br.seek(pos);
br.skipBytes(28);
for (i = 0; i < particleNum; i++) {
br.skipBytes(8);
for (j = 0; j < pollutantNum; j++) {
br.skipBytes(4);
}
br.skipBytes(8);
lat = br.readFloat();
lon = br.readFloat();
alt = br.readFloat();
if (varName.startsWith("lon"))
r.setFloat(i, lon);
else if (varName.startsWith("lat"))
r.setFloat(i, lat);
else
r.setFloat(i, alt);
br.skipBytes(40);
}
return r;
} catch (IOException e) {
return null;
}
}
Example 4
| Source File: HYSPLITPartDataInfo.java From MeteoInfo with GNU Lesser General Public License v3.0 | 4 votes |
|
/**
* Read data frame
*
* @param timeIdx Time index
* @return Data frame
*/
public DataFrame readDataFrame(int timeIdx) {
try {
int particleNum = _parameters.get(timeIdx).get(0);
int pollutantNum = _parameters.get(timeIdx).get(1);
int pos = _parameters.get(timeIdx).get(2);
List<Array> data = new ArrayList<>();
ColumnIndex columns = new ColumnIndex();
for (Variable var : this.variables) {
if ((int)var.findAttribute("time_index").getNumericValue() == timeIdx) {
columns.add(new Column(var.getName(), var.getDataType()));
data.add(Array.factory(var.getDataType(), new int[]{particleNum}));
}
}
RandomAccessFile br = new RandomAccessFile(this.getFileName(), "r");
int i, j;
float lon, lat, alt;
br.seek(pos);
br.skipBytes(28);
for (i = 0; i < particleNum; i++) {
br.skipBytes(8);
for (j = 0; j < pollutantNum; j++) {
br.skipBytes(4);
}
br.skipBytes(8);
lat = br.readFloat();
lon = br.readFloat();
alt = br.readFloat();
data.get(0).setFloat(i, lat);
data.get(1).setFloat(i, lon);
data.get(2).setFloat(i, alt);
br.skipBytes(40);
}
Index index = Index.factory(particleNum);
DataFrame df = new DataFrame(data, index, columns);
return df;
} catch (IOException e) {
return null;
}
}
Example 5
| Source File: HYSPLITPartDataInfo.java From MeteoInfo with GNU Lesser General Public License v3.0 | 4 votes |
|
@Override
public StationData getStationData(int timeIdx, String varName, int levelIdx) {
try {
StationData stationData = new StationData();
List<String> stations = new ArrayList<String>();
int particleNum = _parameters.get(timeIdx).get(0);
int pollutantNum = _parameters.get(timeIdx).get(1);
int pos = _parameters.get(timeIdx).get(2);
double[][] discreteData = new double[particleNum][3];
RandomAccessFile br = new RandomAccessFile(this.getFileName(), "r");
byte[] aBytes;
int i, j;
float lon, lat, alt;
float minX, maxX, minY, maxY;
minX = 0;
maxX = 0;
minY = 0;
maxY = 0;
br.seek(pos);
br.skipBytes(28);
for (i = 0; i < particleNum; i++) {
br.skipBytes(8);
for (j = 0; j < pollutantNum; j++) {
br.skipBytes(4);
}
br.skipBytes(8);
lat = br.readFloat();
lon = br.readFloat();
alt = br.readFloat();
discreteData[i][0] = lon;
discreteData[i][1] = lat;
discreteData[i][2] = alt;
stations.add("P" + String.valueOf(i + 1));
br.skipBytes(40);
if (i == 0) {
minX = lon;
maxX = minX;
minY = lat;
maxY = minY;
} else {
if (minX > lon) {
minX = lon;
} else if (maxX < lon) {
maxX = lon;
}
if (minY > lat) {
minY = lat;
} else if (maxY < lat) {
maxY = lat;
}
}
}
Extent dataExtent = new Extent();
dataExtent.minX = minX;
dataExtent.maxX = maxX;
dataExtent.minY = minY;
dataExtent.maxY = maxY;
br.close();
stationData.data = discreteData;
stationData.dataExtent = dataExtent;
stationData.stations = stations;
return stationData;
} catch (IOException ex) {
Logger.getLogger(HYSPLITPartDataInfo.class.getName()).log(Level.SEVERE, null, ex);
return null;
}
}
