Learning Forum

[megan.obrien]

Hi,

I have calculated and saved to a text file the data for both neffTM and neffTE for varying fill factor of a grating coupler. I want to load this data into another Lumerical script and use it for calculating the different pitch values required.

The lines of code I have used to load the textfile into the script is as follows:

M = readdata("textfile.txt");

And the data is then loaded as a [17,3] matrix called M into the script workspace. I need to access the 2nd and 3rd columns for the pitch calculations, as te 2nd column is the neffTM values and the 3rd column is the neffTE values.

However, I am failing to access them as it is. Can anyone help me out please?

 

[Guilin Sun]

Here is an intro about matrix  https://optics.ansys.com/hc/en-us/articles/360034929613-matrix-Script-command

Since this is a 2D matrix, you can access it as

neffTM=M(n,2);

neffTE=M(n,3)

where n is the index for fill factor., eg, n=1

you have the first value of the fill factor M(1,1); and neffTM and neffTE are the correspodent neff for this fill factor.

Please try and compare your original data.