add another column to the end of matrix

Question

abdul rehman 2021-7-9

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/875118-add-another-column-to-the-end-of-matrix

评论： KSSV 2021-7-9

I want to add the results of "a" at the end of Carr_veh matrix. I mean in the 6th column the all results of a shouled be. Maybe create another matrix and merge. I am unable to do this.

Code:

x1=randi(5);
y1=randi(5);
time_e=randi([1 5]);
Carr_veh = [rand(100,1),randi([0,1],100,1),randi([5,8],100,1),randi([5,8],100,1),randi([5,12],100,1)]
 for i=1:100
a=sqrt(((Carr_veh(i,3))-x1)^2+(Carr_veh(i,4))-y1)^2
 end

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Simon Chan 2021-7-9

编辑：Simon Chan 2021-7-9

a is replacing itself in the loop, try replacing the for loop with the following

a = sqrt((Carr_veh(:,3)-x1).^2 + (Carr_veh(:,4)-y1).^2);

another_matrix = horzcat(Carr_veh,a)

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Answer 1

KSSV 2021-7-9

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/875118-add-another-column-to-the-end-of-matrix#answer_743183

编辑：KSSV 2021-7-9

在 MATLAB Online 中打开

x1=randi(5);
y1=randi(5);
time_e=randi([1 5]);
Carr_veh = [rand(100,1),randi([0,1],100,1),randi([5,8],100,1),randi([5,8],100,1),randi([5,12],100,1)] ;
a = zeros(100,1) ;    %<--- Initialize a into a column matrix for appending later 
for i=1:100
    a(i)=sqrt(((Carr_veh(i,3))-x1)^2+(Carr_veh(i,4))-y1)^2 ; 
end
iwant = [Carr_veh a] ;   % add a as the last column 

Actually you need not to use a loop. Just use:

x1=randi(5);
y1=randi(5);
time_e=randi([1 5]);
Carr_veh = [rand(100,1),randi([0,1],100,1),randi([5,8],100,1),randi([5,8],100,1),randi([5,12],100,1)] ;
a = sqrt(((Carr_veh(:,3))-x1).^2+(Carr_veh(:,4))-y1).^2 ; 
iwant = [Carr_veh a] ;