Out of range subscript

Hello, I got the famous "Out of range subscript" problem :

Error using sub2ind (line 43)
Out of range subscript.

Currently, I'm trying to use vector instead of loop in my program. Here is some code :

% Sorry I'm french, so comment are also in french.

vlat=vlat';

for i=2:length(vlong)       % fl_getbathy utilise des matrices de taille identique pour fonctionner
    i
    vlat(:,i)=vlat(:,i-1);  % Il faut donc copier (en colonne) la latitude autant de fois qu'il y a de longitude (dans une ligne)
end

[m,n]=size(vlat);   % on récupère la taille de la matrice m*n (m : colonne, n : longueur)

vlong=vlong'

for i=2:m  % On fait de même avec la longitude
    i
    vlong(:,i)=vlong(:,i-1);  % On copie autant de fois (en ligne) la longitude qu'il de latitude (dans une colonne)
end

vlong=vlong';

topo1=fl_getBathy(vlong,vlat,lat1,long1,Bath1) % <== The problem happen here

I tryied to fix it with some tips that I saw on the site but nothing worked well.

Anyone have an idea ?

Is it possible that the function fl_getBathy can't handle vector for "vlong" "vlat" ? I mean if the function counldn't handle it which error should occur ?

P.S : Sorry if my English is not that good, trying my best to be clear.

[Santhana Raj]

Without knowing what is happening in the function fl_getBathy(.), it is difficult to debug. If you haven't written this function and you don't have the source, it is better to ask the developer.

[Guillaume]

Yes, the error is not in the code you show, so we can't tell what the problem is.

However, the code you've shown is overly complicated. To replicate a vector use repmat, and to grid two vectors use ndgrid. Your code in just two lines:

[vlat, vlong] = ndgrid(vlat, vlong);
topo1 = fl_getBathy(vlong, vlat, lat1, long1, Bath1);

[KSSV]

Your error is due to dimensions of the data which you are inputting. We cannot help you unless the function and the input dimensions are known.

[per isakson]

Google found

• https://uk.mathworks.com/matlabcentral/answers/337605-how-to-plot-coast-on-an-image and
• https://www.developpez.net/forums/d1687918/environnements-developpement/matlab/images/affecter-coordonnees-image/

[Stephen23]

Lionel Dété's "Answer" moved here:

Sorry... It seems like I miss lot of things here. I will try to answer to all of the comment :

So, First, here is the code use for fl_getBathy :

   function bathy=getBathy(la,lo,vlat,vlon,imada)

    bathy = NaN;
    l_buffer = abs(vlat-la);
    l_indicesLat = find(l_buffer == min(l_buffer));
    l_buffer = abs(vlon - lo);
    l_indicesLon = find(l_buffer == min(l_buffer));
    bathy = imada(l_indicesLat(1),l_indicesLon(1));

For my input : vlong, vlat are matrix 10980*10980 lat1, long1 and Bath1 are matrix 62*97

I didn't even show to the function itself before (just found it..)

If I understand well, vlat and la have to be the same size right (like vlon and lo) ?

Thank you for the help, and thank you for the advice in the program improvement

[Lionel Dété]

Ok, I just find a way to avort the problem. I resize the matrix i get before to create my mask. Thank you all for helping !