casa5
Public
Commits
| 187 187 | <equals type="bool" value="False"/> |
| 188 188 | <equals type="bool" value="True"> |
| 189 189 | <default param="timebin"><value type="string">0s</value></default> |
| 190 190 | <default param="timespan"><value type="string"></value></default> |
| 191 191 | <default param="maxuvwdistance"><value type="double">0.0</value></default> |
| 192 192 | </equals> |
| 193 193 | </when> |
| 194 194 | |
| 195 195 | </constraints> |
| 196 196 | </input> |
| 197 - | <output> |
| 198 - | <param type="any" name="xstat"> |
| 199 - | <description>Statistical information for the selected MeasurementSet</description> |
| 200 - | <any type="variant"/> |
| 201 - | <value>{}</value> |
| 202 - | </param> |
| 203 - | </output> |
| 204 - | <returns type="void"/> |
| 197 + | <returns type="record"/> |
| 205 198 | |
| 206 199 | <example> |
| 207 200 | |
| 208 201 | This task returns statistical information about data in a MeasurementSet |
| 209 202 | or Multi-MS. |
| 210 203 | |
| 211 - | The following values are computed: mean value, sum of values, sum of |
| 204 + | The following statistics are computed: mean value, sum of values, sum of |
| 212 205 | squared values, median, median absolute deviation, first and third |
| 213 206 | quartiles, minimum, maximum, variance, standard deviation, and root mean |
| 214 207 | square. |
| 215 208 | |
| 216 - | The following axes are supported: uvw, flag, weight, sigma, antenna1, |
| 217 - | antenna2, feed1, feed2, field_id, array_id, data_desc_id, flag_row, |
| 218 - | interval, scan, scan_number, time, weight_spectrum, amp, amplitude, |
| 219 - | phase, real, imag, imaginary, and uvrange. |
| 209 + | Statistics may be computed on any of the following values: uvw, flag, |
| 210 + | weight, sigma, antenna1, antenna2, feed1, feed2, field_id, array_id, |
| 211 + | data_desc_id, flag_row, interval, scan, scan_number, time, |
| 212 + | weight_spectrum, amp, amplitude, phase, real, imag, imaginary, and |
| 213 + | uvrange. |
| 214 + | |
| 215 + | The 'reportingaxes' argument is used to partition the sample set along an |
| 216 + | axis. For example, setting its value to 'ddid' will result in the |
| 217 + | statistics of the chosen sample values partitioned by unique values of the |
| 218 + | data description id. Thus setting 'axis' to 'amp' and 'reportingaxes' to |
| 219 + | 'ddid' will report statistics of visibility amplitudes for each unique |
| 220 + | value of data description id in the MeasurementSet. |
| 220 221 | |
| 221 222 | Optionally, the statistical information can be computed based only |
| 222 223 | on a given subset of the MeasurementSet. |
| 223 224 | |
| 224 225 | Note: If the MS consists of inhomogeneous data, for example several |
| 225 226 | spectral windows each having a different number of channels, it may be |
| 226 227 | necessary to use selection parameters to select a homogeneous subset of |
| 227 228 | the MS, e.g. spw='2'. |
| 228 229 | |
| 229 230 | Keyword arguments: |