Importing data from HFSS and ploting in matlab

I designed a dipole in HFSS and exported the polar radiation pattern in csv format to matlab. now, i need help on how to plot the data and get the same result as HFSS. I also attached the raw csv format.

Answer 1

[Dan Klemfuss]

Good Evening Mordecai. The following code ingests and plots the data in a figure for each Phi angle. Please let me know if you have any questions.

[num, txt] = xlsread('pat.csv');

theta_polar_deg = num(:,1);

theta_polar_rad = deg2rad(theta_polar_deg);

for i = 1:length(txt-1)

      figure('Name',txt{i},'NumberTitle','off','MenuBar','none');
      Gain = num(:,i);
      polarplot(theta_polar_rad, Gain,'r')
      rlim([min(Gain)-5 max(Gain)+5]);
      ax = gca;
      ax.RTick = [-38 -26 -14 -2];
      ax.ThetaDir = 'clockwise';
      ax.ThetaZeroLocation = 'top';
      plotTitle = sprintf('Radiation Pattern %d',i);
      title(plotTitle)
  end

[Mordecai Raji]

Hi DRK, thanks for your help but i got this error Undefined operator '-' for input arguments of type 'cell'. Error in mathelp (line 7) for i = 1:length(txt-1)

help me out! thanks

[Dan Klemfuss]

Good evening. I accidentally added the -1 inside the parenthesis, it should have been for i = 1:length(txt)-1. Please try the updated code below:

[num, txt] = xlsread('pat.csv');
theta_polar_deg = num(:,1);
theta_polar_rad = deg2rad(theta_polar_deg);
for i = 1:length(txt)-1
    figure('Name',txt{i},'NumberTitle','off','MenuBar','none');
    Gain = num(:,i);
    polarplot(theta_polar_rad, Gain,'r')
    rlim([min(Gain)-5 max(Gain)+5]);
    ax = gca;
    ax.RTick = [-38 -26 -14 -2];
    ax.ThetaDir = 'clockwise';
    ax.ThetaZeroLocation = 'top';
    plotTitle = sprintf('Radiation Pattern %d',i);
    title(plotTitle)
end

[Mordecai Raji]

Hi, i got this result. i have tried tweaking it but can't get something close. You gotta help me please!

[Dan Klemfuss]

Hello Mordecai. I'm not sure why you got that result. I noticed in the CSV, column A has the theta values, so I modified the code to omit this column in the loop (that's why it is now "for i=2:length(txt)"). Please try the below code, I've attached an example of the output I am getting. Let me know if this works!

[num, txt] = xlsread('pat.csv');
theta_polar_deg = num(:,1);
theta_polar_rad = deg2rad(theta_polar_deg);
for i = 2:length(txt)
    figure('Name',txt{i},'NumberTitle','off','MenuBar','none');
    Gain = num(:,i);
    polarplot(theta_polar_rad, Gain,'r')
    rlim([min(Gain)-5 max(Gain)+5]);
    ax = gca;
    ax.RTick = [-38 -26 -14 -2];
    ax.ThetaDir = 'clockwise';
    ax.ThetaZeroLocation = 'top';
    plotTitle = sprintf('Radiation Pattern %d',i-1);
    title(plotTitle)
end

[Dan Klemfuss]

P.S. This is the pat.csv file I was using, if it doesn't match the format you are using that may explain why you got a different result.

[Mordecai Raji]

Oh thanks, it works now. Great!

[mahdi reshadat]

I have same project so i do your work but i give this error. What can i do?

Error is: Undefined function 'polarplot' for input arguments of type 'double'.

Error in Help (line 10) polarplot(theta_polar_rad, Gain,'r')

Answer 2

[Mordecai Raji]

Hi Mahdi, I think it's your MATLAB version. Instead use the function 'polar' instead of polarplot. I.e polar(theta_polar_rad, Gain, 'r')

[mahdi reshadat]

thank you. I use new version of MATLAB and it work.