Why I see only the last value of my row vector in the workspace?

Question

Wiqas Ahmad 2022-4-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1700080-why-i-see-only-the-last-value-of-my-row-vector-in-the-workspace

评论： Wiqas Ahmad 2022-4-19

采纳的回答： KSSV

在 MATLAB Online 中打开

I have the following row vectors in my program:

When I run my program, I see in the workspace only the last value of these row vectors as :

I don't know whether my program executes using only the last values of these row vectors or all. What modification my program needs so that I can see all these row vectors in my workspace instead of a singla value? My program is:

clear all; close all; clc; 
cloud = 'Homo';
T_para = zeros(5, 17, 20);
T_per = zeros(5, 17, 20);
cth=[1010:10:1200]
h = [1000:1000:4000];
a = [0.01:0.01:0.05];
r = [4:1:20];
fov = [0.2 0.5 1 2 5 10]
snr=[30 40 50 65 75];
for h = 1000:1000:4000
    for fov = [0.2 0.5 1 2, 5 10]
        dir_arhf = ['Tabledata_', cloud, '\', num2str(h), 'm-', num2str(fov), 'mrad'];
        mkdir(dir_arhf);
        for a = 0.01:0.01:0.05
            for r = 4:1:20
                load (['MCdatabase_', cloud, '/', num2str(a), '-', num2str(r), 'um/', num2str(h), 'm-', num2str(fov), 'mrad/I0.mat']);
                load (['MCdatabase_', cloud, '/', num2str(a), '-', num2str(r), 'um/', num2str(h), 'm-', num2str(fov), 'mrad/Q0.mat']);
                I_para = 1/2 * (I0 + Q0);
                I_per = 1/2 * (I0 - Q0);
                hh = genHeight(h).^2;
                beta_para = sum(I_para, 2) .* hh';
                beta_per = sum(I_per, 2) .* hh';
                T_para(a * 100, r-3, :) = beta_para';
                T_per(a * 100, r-3, :) = beta_per';
                Norm_para(a * 100, r-3, :)=(T_para(a * 100, r-3, :)./max(T_para(a * 100, r-3, :)));
                Norm_per(a * 100, r-3, :)=(T_per(a * 100, r-3, :)./max(T_per(a * 100, r-3, :)));
                for snr=[30, 40, 50, 65, 75]
                    snr_para(a * 100, r-3, :)=awgn(T_para(a * 100, r-3, :),snr);
                    snr_per(a * 100, r-3, :)=awgn(T_per(a * 100, r-3, :),snr);
                    costf=sqrt((snr_para(a * 100, r-3, :)-Norm_para(a * 100, r-3, :)).^2+(snr_per(a * 100, r-3, :)-Norm_per(a * 100, r-3, :)).^2);
                    save([dir_arhf, '\TABLE.mat'], 'T_per', 'T_para');
                end
            end
        end
    end
end

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Stephen23 2022-4-19

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Look at your FOR loops:

h = [1000:1000:4000]; % this is totally unused
..
for h = 1000:1000:4000 % becaue you redefined h here

The same for all of those other variables.

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Answer 1

KSSV 2022-4-19

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1700080-why-i-see-only-the-last-value-of-my-row-vector-in-the-workspace#answer_946050

在 MATLAB Online 中打开

You are using the vector as the loop index so obviously you will find only the last value. You can check it your self.

for a = 0.01:0.01:0.05
    a
end
a = 0.0100
a = 0.0200
a = 0.0300
a = 0.0400
a = 0.0500
fprintf('%f\n',a)
0.050000

You see, only the last value is printed, as it is the last index value. If you want it as a vector, you need to run like shown below.

a = 0.01:0.01:0.05;
for i = 1:length(a)
    a(i)
end
ans = 0.0100
ans = 0.0200
ans = 0.0300
ans = 0.0400
ans = 0.0500
% after loop a
a
a = 1×5
    0.0100    0.0200    0.0300    0.0400    0.0500