how to fill pre allocated matrix using two columns vectors

Matrix = zeros(5)

interval range =10

X = [ 35;43;22]

Y = [75;44;67]

40

50

Y 60

70

80

10 20 30 40 50

X - axis

how to fix these values inside the above grid using matlab coding.

i have tried a lot using for loops but its not comming correct.

All cooperation is highly appreicated.

Regards

[Shashank Sharma]

It is unclear as to what you are attempting.

What is the expected output of your code ?

Answer 1

[Andrei Bobrov]

xx = 10:10:50;
yy = 40:10:80;
X = [ 35;43;22];
Y = [75;44;67];

m = numel(xx);
n = numel(yy);
out = zeros(m,n);

x10 = 10*floor(X/10);
y10 = 10*floor(Y/10);

[~,ii] = ismember(x10,xx);
[~,jj] = ismember(y10,yy);

out(sub2ind([m,n], ii, jj)) = 1;

[M.S. Khan]

Thanks you so much Mr Andrei Bobrov. God bless you. Warm regards.

[M.S. Khan]

Mr. Andrei Bobrov. ,

https://www.mathworks.com/matlabcentral/answers/468916-how-to-fill-pre-allocated-matrix-using-two-columns-vectors#answer_380843

Thanks for giving me input,. i have done it succesfully.

Could you plz guide me how to only label the interior part of the object using same techniqure.

Same question but only need the interior part to be labelled as 2 or 1.

i will be very thankful.

warm regards

[erik jensen]

This is wrong.

ii, jj, and kk are INDEXES not SUBSCRIPTS. So for a larger data set, would fall out of range

Answer 2

[KSSV]

X = [ 35;43;22] ;
Y = [75;44;67] ;
[X,Y] = meshgrid(X,Y);

Answer 3

[madhan ravi]

% Illustration
Matrix = zeros(5); 
X = (10:10:50).'; % column vectors
Y = (40:10:80).';
Matrix(end,:) = X.';
Matrix(:,1) = Y

[M.S. Khan]

X = [ 35;43;22]

Y = [75;44;67]

Mr. Ravi, how will we fill X and y in this grid that you have designed

plz help

[M.S. Khan]

Mr. Ravi, Matrix = zeros(5). it will give us zeros matrix.

i want to fill the X and y vectors values inside the Matrix using matlab coding.

[madhan ravi]

Show how your result should look like?

[M.S. Khan]

results will be like this:

[madhan ravi]

Honestly, how are the certain fields yellow?