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Plotting data from array

IvarL

Hi,

I am having problems plotting or retreiving data from an array. I declare an x-axis and a function, e.g.

declare(xaxis[len]) 
declare(output[len])

and then do some calculations

for(i 0 len-1
   xaxis = i
   output = algorithm(xaxis)
)

where algorithm() is a general algorithm doing some processing. Now I want to plot "output". I have tried both

wave_output = drCreateWaveform(output xaxis)
wave_output = abMakeWaveform(output xaxis)

but none of these work because they want the output-values as a list rather than a vector/array. The output array contains data, so I can see the values output[0], output[1] etc, but I haven't found out how to convert them to a wave. How do I go about to produce a waveform from the output I have generated with the algorithm?

Thanks.

  • Andrew Beckett

    You could use vectorToList(output) to get a list. And the same for the xaxis. Or you could directly create the X and Y vectors as you go along:

    xaxis=drCreateVec('double len)
    output=drCreateVec('double len)
    for(i 0 len-1
      drSetElem(xaxis i i)
      drSetElem(output i algorithm(i))
    )
    wave=drCreateWaveform(xaxis output)

    Andrew

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