How to fixed the issue of variable data length ?

Question

aa 2020-10-11

0
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https://ww2.mathworks.cn/matlabcentral/answers/610486-how-to-fixed-the-issue-of-variable-data-length

回答： Walter Roberson 2020-10-11

采纳的回答： Walter Roberson

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Hi everyone,

May somone help me ...

Might be my problem is very puzzling... I have same type of data in two diffrent files with varying data length. I code works perfectly for one data set (A .. Attched here) but did not work for the second data set (B attched here) without any error ...

Code is as below:

clear all
clc
x = -130.04:0.0025:-129.96; 
y = 45.91:0.0025:45.99; 
n = length(x ) ;
m = length(y ) ;
[X,Y] = meshgrid(x,y ) ;
data = load('B.txt');
x = data(:,1) ; y = data(:,2) ; z = data(:,3 ) ;
% plot grid
plot(X,Y,'r',X',Y','r ')
hold on
for i = 1:m-1
for j = 1:n-1
% Get the points of each grid
P = [X(i,j) Y(i,j ) ;
X(i,j+1) Y(i,j+1 ) ;
X(i+1,j+1) Y(i+1,j+1 ) ;
X(i+1,j) Y(i+1,j )] ;
idx = inpolygon(x,y,P(:,1),P(:,2 )) ;
iwant = [ z(idx )] ;
plot(x(idx),y(idx ),'.')
drawnow
zStore{i,j} = z(idx);
end
end
axis([-130.04  -129.96  45.91  45.99])
% 
N = max(cellfun(@numel,zStore));
 zMat = nan(10000,256);
% for i = 1:numel(zStore)
k=1;
for i = 1:32
    for j=1:32
    zMat(1:numel(zStore{i,j}),k) = zStore{i,j};
    k=k+1;
    end 
end
 %xlswrite('data',zMat)