How to append a plot from a .csv file on to an already WaveScan/ViVA plot

So you want to concatenate two waveforms (did I understand you correctly)? You could use this custom function to concatenate the two.

Andrew.

Thanks Andrew, Yes this can be used but how to bring the x and Y data from the .csv file to the wave in Viva and then concatenate it ?

It's a bit of a strange requirement, but you should be able to bring in the data from the CSV using the getAsciiWave function in the calculator, and the original waveform you should be able to use Right Mouse->Send->To Calculator (or something like that) and then use my custom concatenation function, and plot the result.

Andrew.

Dear Andrew,

I tried to use getAsciiWave function for a csv file.

The data format in the file is as below:- (the 1st column is the timestamp and the 2nd column is the voltage value)

0.000000000000000e+00 , -1.599895321664491e-04
1.022413504667159e-13 , -1.925820261625804e-04
2.044827009334319e-13 , -2.264630041929152e-04
3.067240514001478e-13 , -2.641736431026884e-04
4.089654018668637e-13 , -3.011815624487069e-04
5.112067523335796e-13 , -3.374965222249115e-04

I then use the command in the calculator as below:-

getAsciiWave("/user/home/MAT_WORK_CAD/PPV_ISF_OSC/RING_OSC_HB_TD_WAVE.csv" 1 2 ?xskip 0 ?yskip 0 ?formatFloat t ?xName "Time" ?xUnits "s" ?yName "V" ?yUnits "v" ).

But, it is not plotting in ViVa. The file location is correct.

The errors I am getting in CIW is as:- 

expression evaluation failed: val is not legal.
expression evaluation failed: getAsciiWave("/user/home/MAT_WORK_CAD/PPV_ISF_OSC/RING_OSC_HB_TD_WAVE.vcsv" 1 2 ?xskip 0 ?yskip 0 ?formatFloat t ?xName "Time" ?xUnits "s" ?yName "V" ?yUnits "v" )
Data directory must point to valid simulation results.

Could you please tell why this is happening ?

There's an issue if you have CSV files when you use ?formatFloat t (so set that to "off" on the form to avoid this). If you have formatFloat set to "on" (or t), then you need to remove the commas in the file. Since all the numbers are floating point anyway, you can leave formatFloat as off and then you don't need to change the file (CCR 1629658 is about this). So this should work:

getAsciiWave("/user/home/MAT_WORK_CAD/PPV_ISF_OSC/RING_OSC_HB_TD_WAVE.csv" 1 2 ?xskip 0 ?yskip 0 ?formatFloat nil ?xName "Time" ?xUnits "s" ?yName "V" ?yUnits "v" )

Thanks a lot.

When I enter the command in CIW, it is generating a wave and I am able to plot it by plot() command in CIW.

But, in Calculator, by entering the commmand and then pressing the plot button is NOT plotting the wave.

It is giving:-

Data directory must point to valid simulation results.

I don't see that. What version are you using?

Andrew

The virtuoso version is sub-version ICADV12.3-64b.500.23

The spectre version is sub-version 18.1.0.335.isr6