Unusual size of array

Question

Prabhanshu Chandra 2020-8-13

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/579306-unusual-size-of-array

关闭： MATLAB Answer Bot 2021-8-20

W=2um_L=20um.zip

close all;
clc;
clear;
sobj=sparameters('W=2um_L=20um.s2p');
s=sobj.Parameters;
freq=sobj.Frequencies;
y_params = s2y(s);
y11=y_params(1,1,:);
y12=y_params(1,2,:);
y21=y_params(2,1,:);
y22=y_params(2,2,:);
Ca=(imag(y11+y12))./(2*pi.*freq);
Cb=(imag(y22+y21))./(2*pi.*freq);
R=real(-1/y21);
L=(imag(-1/y21))./(4*pi*freq);

In the code above I converted S parameter in s2p file attached to y parameters, and I am trying to to calculate some values from that. However for some reason the size of Ca, Cb and L arrays is unusual, according to me they should be 1D arrays with 201 values, however when calculated they come out to be 201X201 values.

Can someone point out the mistake in my code? I am very new to this, any optimisation and use of objects and how I am accesing y parameters, any improvement will be highly appreciated.

Thankyou in advance.

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David Hill 2020-8-13

在 MATLAB Online 中打开

You just need to examine the sizes of your arrays in your workspace. I suspect that freq matrix is a 201x201. Not sure how you want to handle it.

R=real(-1./y21);%I believe you need ./
L=(imag(-1./y21))./(4*pi*freq);%same here

Prabhanshu Chandra 2020-8-14

This is the workspace, as you can see freq is 1D array.

About the ./ , I did that earlier, it did not have any change in the results.

此问题已关闭。

Answer 1

Bruno Luong 2020-8-17

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/579306-unusual-size-of-array#answer_480876

在 MATLAB Online 中打开

Try this

sobj=sparameters('W=2um_L=20um.s2p');
s=sobj.Parameters;
freq=sobj.Frequencies;
y_params = s2y(s);
y11=y_params(1,1,:);
y12=y_params(1,2,:);
y21=y_params(2,1,:);
y22=y_params(2,2,:);
Ca=(imag(y11(:)+y12(:)))./(2*pi.*freq(:));
Cb=(imag(y22(:)+y21(:)))./(2*pi.*freq(:));
R=real(-1./y21(:));
L=(imag(-1./y21(:)))./(4*pi*freq(:));