Index in position 1 exceeds array bounds (must not exceed 1).

clc
clear all
close all

path = 'H:\radition';
Date= importdata([path '\radd.csv']);

dB = Date(1:360,3);
% pol_1 = 10*log10(Data(1:121,3)./max(Data(1:121,3)));
Theta = Data(1:361,1)*pi/180;
dB = dB-min(dB);
polarplot (Theta,(dB/50))
hold on

[Atsushi Ueno]

The output from importdata function seems to be struct.

Theta (B1:B360) looks like only 90[deg] or 270[deg].

Date= importdata('radd.csv')

Date = struct with fields:
          data: [360×7 double]
      textdata: {360×1 cell}
    rowheaders: {360×1 cell}

dB = Date.data(1:360,3);
% pol_1 = 10*log10(Data(1:121,3)./max(Data(1:121,3)));
Theta = Date.data(1:360,1)*pi/180;
dB = dB-min(dB);
polarplot (Theta,(dB/50))
hold on

[Aya Emam]

but this is the solution

Answer 1

[KSSV]

T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1388229/radd.csv') ;
dB = T.(3) ;
% pol_1 = 10*log10(Data(1:121,3)./max(Data(1:121,3)));
Theta = T.(1)*pi/180;
dB = dB-min(dB);
polarplot (Theta,(dB/50))

[Aya Emam]

but sir the pic should be like that can you help me how to draw like that by using the same excel sheet

[Aya Emam]

like 8 can you help me to draw like this by using the same excel sheet pleas sir

[KSSV]

Try changing the indices i.e. columns.