problem using for loop

Question

Alfonso Maria Ranieri 2020-10-1

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/603286-problem-using-for-loop

回答： Raunak Gupta 2020-10-5

close all

%key_parameters

a=6396;%startpoint_to_establish_the_lap_modifybytheuser

b=12664;%endpoint_to_establish_the_lap_modifybytheuser

distance=acq.dist(a:b);

Cornersforcycle=zeros(length(distance),1);

Corners=[1861 1920; 1936 2064; 2071 2140; 2161 2272; 2331 2391; 2417 2601; 2645 2791; 2984 3286];

% Corners=[204 340; 379 901; 932 1302; 1389 1972; 2198 2420; 2510 3294; 3455 4066; 4638 5708];

for i=1:length(Corners) <------Is here the error?

for x=1:length(Cornersforcycle) <--------Is here the error?

if distance(x)>=Corners(i,1) && distance(x)<=Corners(i,2)

Cornersforcycle(x)=1;

else

Cornersforcycle(x)=0;

end

scatter(acq.Track_X(a:b),acq.Track_Y(a:b),5,Cornersforcycle,'filled');

axis auto

grid on

colormap(hsv(2))

colorbar

why the following for loop returns me only the last value? my wish is that the for loop to take the values line by line and not just the last one

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VBBV 2020-10-2

Use break statement in the else part of _if_loop and see what result you get

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Answer 1

Raunak Gupta 2020-10-5

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/603286-problem-using-for-loop#answer_505666

Hi,

Since Corners variable is a matrix, length is probably not the correct function to get the number of elements in particular dimension, you may probably use size. As for the query about last value, I understand that it signifies that only last value in Cornersforcycle is equal to 1. If that is the case, then it is totally dependent on the if condition in the for loop to set the value.

If that doesn’t help, as Vasishta mentioned you can print the intermediate values using disp or can use breakpoints.