1.3.3.0 msplot.setdata

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msplot.setdata - Function

1.3.3 Select a subset of the measurement set to operate on.

Description

Select a subset of the measurement set. All plots will operate on this subset of the measurement set based on the values given.

All of the Index fields expect lists of integers. All of the Name fields accept strings. Where both indices and expressions are allowed as inputs (antenna’s for example), they will be combined together when selecting the data.

The expression strings contain values separated by ’,’. The wildcard character ’*’ can be used with the names. The ’¿’ and ’¡’ characters can be used to indicate values that are greater then, or less then (respectively) a particular value.

Note: that integer values in the antennaNames list will be interpreted as indices. The ’~’ indicates a range for values.

Spectral windows names are bit of a special case as channel information can be specified too. Spectral windows are in the folling format: (spwlist):(channellist) where the spetral window and channel list follow the expression conventions listed above. ”RR,LL,RL” ”[RR LL RR]” ”(XX)” where different types of polarizations are separated by a space or a comma.

Arguments


Inputs
baseline	Baseline selection expression.
	allowed:	string
	Default:
field	Field selection string.
	allowed:	string
	Default:
scan	Scan selection string.
	allowed:	string
	Default:
uvrange	UV Range selection string.
	allowed:	string
	Default:
array	Array selection string.
	allowed:	string
	Default:
feed	Feed selection string.
	allowed:	string
	Default:
spw	Spectral Window selection string.
	allowed:	string
	Default:
correlation	Correlation selection string.
	allowed:	string
	Default:
time	Time selection values are in the form: YYYYMMMMDDhh:mm:ss~YYYYMMDDhh:mm:ssŝtep where the first or second term may be dropped, and more then one range may be specified. Ranges are separted by a ”,”. The step value is a real value representing the number of seconds to skip or average, depending on the value given.
	allowed:	string
	Default:

Returns
bool

Example

# create a msplot tool and set the subset data for plotting.
  mp.open( msname=’./data/3C273XC1.ms’);

# Select all antenna’s that begin with VLA or N, field 1,2 and 3,
# ’RR’ and ’LL’ correlations, and spectral windows 3,4, and 5.
  mp.setdata( antennaNames=’VLA:N*’, fieldNames=’1~3’, correlations=’RR, LL’,\
      spwIndex=[3,4,5] );

# Select all fields, LR correlations, uvdists greater than 125 kilolambda,
# and times of June 27, 1989 at 3:31:40.
  mp.setdata( fieldNames’*’, correlations=’LR’, uvDists=’>125kl’ \
      times=’1989/06/27/03:31:40’ );

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