How to plot a graph?

 If I understand your request you are trying to plot data that did not come from the simulator but is either hand created or comes from another tool and is in ASCII form.  Both WaveScan & ViVA XL provide the ability to load a "csv" like file and to treat it like a read database using the ".vcsv" extension.  The data is just a standard "csv" file but with specific header information.

 I've included a sample file I have created that shows the header information although this format was designed for creation from the tool using the save/export feature and not really meant for hand creation.   Anyway row 2 is the net names, row 3 is the column alignments, row4 is the data type (Re and Im) for support of complex data, row5 is the axis label, and row 6 are the axis units.

 ;Version, 1, 0
;net1,; net2
;X, Y,;X, Y
;Re, Re,;Re, Re
;time, V,;time, V
;s, V,;s, V
0.000,   1.00,  0.000,  0.00
0.001,   0.50,  0.001,  0.33
0.003,   0.00,  0.003,  1.21
0.007,  -0.50,  0.007,  0.72
0.009,  -1.00,  0.009,  0.18

The calculator also has a function called "getAsciiWave" that will load a data file into the tool that can be plotted but this is limited to one signal load at a time as you select which two columns to load into the tool.

 Likewise you can create data directly in SKILL but for most users one of the above two methods is the best solutions. 

 Hope this helps,

 jons

 hi jons, thank you very much for your reply

 I've run a simulation from other circuit, and i get a .csv file, I modified the .csv file by changing to the data which i wanna plot. I loaded into the wavescan but it stated that '' missing  of header'' . Actually i wanna plot a Q-factor VS capacitance graph. the Q factor is calculated value so it is not from simulation. Do you have any ideas? 

hi jons ! i make it!!! 

this morning after replying you, i tried again, and i found where was my mistake!

I left an extra line between the data and the "unit" row(last row of heading).

Now i can generate the waveform by loading the .vcsv file. 

thank you very much ! :):)

Great, glad this solved your problem and hopefully others might find this useful.   The format is has only been tested from a computer generated process which always produces the correct syntax (it was not necesary intended for "hand creation") so if you run into problems it is most likley as you found a syntax issue.   Someday we should try to make this less senstative to these types of issues but as you found it does work.

-jons 

 hi jons, I have another question

now i want to use a ocean script to load the data file.

For my understanding, SKILL is used in normall scripting,  while OCEAN is  used in analysis and simulation scriptam i correct? 

I tried to use the getAsciiWave() command, and change the vcsv file to .txt file (removing the heading), but i get an error when loading the ocean script. 

 this is my command -->   getAsciiWave("~/try.txt" 1 2)

is it possible to load .vcsv file in my script?

can you  give me some advice? thank you

hi jons, i have settled this problem. :)

The problem is the beginning of the file. If you call the file something.vcvs and make it look like this:

;S21
;X, Y
;Re, Re
;freq, S21
;Hz, dB
1.50E+09,-4.15E+00
1.51E+09,-4.17E+00
1.51E+09,-4.17E+00
1.52E+09,-4.10E+00
1.52E+09,-3.94E+00
1.53E+09,-3.82E+00
1.53E+09,-3.79E+00
1.54E+09,-3.88E+00
1.54E+09,-4.01E+00

Then you can directly open it in wavescan or ViVA (IC615) . getAsciiWave  will also read this (the x and y skip values should be 0, because it automatically skips the semi-colon lines).

The original file you gave can be read with getAsciiWave if you specify ?xskip 4 ?yskip 4.

Andrew.