3.2.1.0 table.copyrows

table.copyrows - Function

3.2.1 copy rows from this table to another
Description

Copy rows from this table to another. By default all rows of this table are appended to the output table. It is possible though to control which rows are copied.
Rows are added to the output table as needed. Because no rows can be added to a reference table, it is only possible to overwrite existing rows in such tables.

Only the data of columns existing in both tables will be copied. Thus by making a reference table consisting of a few columns, it is possible to copy those columns only.

Arguments


Inputs
outtable	table object of output table
	allowed:	string
	Default:
startrowin	First row to take from input table
	allowed:	int
	Default:	0
startrowout	First row to write in output table, -1 (=end)
	allowed:	int
	Default:	-1
nrow	Nr of rows to copy, -1 (=all)
	allowed:	int
	Default:	-1

Returns
bool

Example

This example appends rows to the table itself, thus doubles the number of rows.

  tb.open(’3C273XC1.MS’,nomodify=False)
  tb.copyrows(’3C273XC1.MS’)
  tb.close()

This example copies 10 rows of the selected subset of the MS to the beginning of the output MS.

  !rm -rf in.MS out.MS
  ms.fromfits(’in.MS’,’3C273XC1.fits’)       #Make two MSs
  ms.fromfits(’out.MS’,’3C273XC1.fits’)      #for example
  ms.close()
  tb.open("in.MS")
  t1 = tb.query(’ANTENNA1==0’)
  tb.close()
  t1.copyrows("out.MS",nrow=10,startrowout=0)
  t1.close()

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