SpecTcl Command Reference.
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channel

Name

channel -- Access spectrum channels

Synopsis

channel -get spname indices

channel -set spname indices value

DESCRIPTION

Allows you to set or get the values of channels in a spectrum.

OPTIONS

-get

The channnel command will retrieve the contents of the channel of spname specified by the channel indices indices/ The indices are raw channel parameters. For a two dimensional spectrum, this must be a list of, in order, x and y channel numbers.

The result of the command is the channel value.

-set

The channel command will set the value of the channel in spname specified by the raw channel indices indices to the new value value. As with -get, for a 2-d spectrum, the indices parameter must be a list of x and y channel numbers.

EXAMPLES

Example 1. Getting the value of a channel in a 1-d spectrum


channel -set TwodSpectrum {123 456} 100

Example 2. Clearing a spectrum using channel


for {set i 0 } { $i < 128 } {incr i } {
   for {set j 0} {$j < 128 } {incr j } {}
      channel -set TwodSpectrum [list $i $j] 0]
    }
}

Normally use the clear command instead of this method.

SEE ALSO

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