Problems storing, processing and displaying ginput value?

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DocD 2017-11-2

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/364664-problems-storing-processing-and-displaying-ginput-value

评论： Adam 2017-11-2

I've got the following code:

clear
clc
close all
Map=imread('Map.Jpg'); 
imshow(Map);
hold on; 
A = zeros(1, 24);
B = zeros(1, 24);
C = zeros(1, 24);
uiwait(msgbox('Choose Point A')); 
[x,y] = ginput(1); %hold on; 
plot(x,y,'r+', 'MarkerSize', 50);
A = ginput(1);
C = pdist2(A,B);
%Value1 = ginput(1);
uiwait(msgbox('Choose Point B'));
[x,y] = ginput(1); %hold on; 
plot(x,y,'r+', 'MarkerSize', 50);
B = ginput(1);
%Value2 = ginput(1);
disp ('Values:')
disp(A);
disp(B);
disp(C);

I'm trying to get it so that: a) I only need to click once instead of twice to get points b) allows me to perform the pdist calculation and output it to the screen

What am I doing wrong?

3 个评论
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DocD 2017-11-2

How do I fix this?

Adam 2017-11-2

Why are you reusing your variable names for something that appears to be completely unconnected? You create A, B and C as vectors of zeros, then just assign something different to A and attempt to do the same to C except that B is still the original vector, but A has been overwritten.

Use meaningful variable names and this should not happen generally.

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