1.3.1.0 ms.statistics

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ms.statistics - Function

1.3.1 Get statistics on the selected measurement set

Description

This function computes descriptive statistics on the measurement set. It returns the statistical values as a python dictionary. The given column name must be a numerical column. If it is a complex valued column, the parameter complex_value defines which derived real value is used for the statistics computation.

Arguments


Inputs
column	Column name
	allowed:	string
	Default:
complex_value	Which derived value to use for complex columns (amp, amplitude, phase, imag, real, imaginary)
	allowed:	string
	Default:
useflags	Use the data flags
	allowed:	bool
	Default:	true
spw	Spectral Window Indices or names : example : ’1,2’
	allowed:	string
	Default:
field	Field indices or source names : example : ’2,3C48’
	allowed:	string
	Default:
baseline	Baseline number(s): example: ”2&3;4&5”
	allowed:	string
	Default:
uvrange	UV-distance range, with a unit : example : ’2.0-3000.0 m’
	allowed:	string
	Default:
time	Time range, as MJDs or date strings : example : ’xx.x.x.x.x~yy.y.y.y.y’
	allowed:	string
	Default:
correlation	Correlations/polarizations : example : ’RR,LL,RL,LR,XX,YY,XY,YX’
	allowed:	string
	Default:
scan	Scan number : example : ’1,2,3’
	allowed:	string
	Default:
array	Array Indices or names : example : ’VLAA’
	allowed:	string
	Default:
obs	Observation ID(s): examples : ” or ’1~3’
	allowed:	string
	Default:

Returns
record

Example

ms.open("3C273XC1.MS")
ms.statistics(column="DATA", complex_value=’amp’, field="2")

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