How to fix error: "Index in position 1 is invalid. Array indices must be positive integers or logical values"

Hello! I am trying to run an automatic software on MATLAB that converts 2D images of brain slices into a 3D model. I am currently in the "slice outline" phase, but I can't seem to troubleshoot an error that reads "Index in position 1 is invalid. Array indices must be positive integers or logical values." If anyone can help solve this I would really appreciate it! I'll attach the code below:

Full error message:

Index in position 1 is invalid. Array indices must be positive integers or logical values.

Error in Img_filename_list (line 41)

img_name{(img_idy+(length(Name_Channels)-channel_check))/length(Name_Channels),channel_check}=char(img_names_raw(ii));

Error in STEP_1_Slice_Outline (line 10)

img_name=Img_filename_list(img_format);

Code:

(Slice Outline)

STEP_0_Parameters;
toolbox_chk
warning('off')
img_name=Img_filename_list(img_format);      # <---- line 10#

h_progress = waitbar(0,'Slice Boundary Detection');

manual_list=[];

Code for (Img_filename_list.m) : (line 37-44)

for ii=1:size(img_info_no,1)
    img_idy=find(img_info_no(:,4)==ii);
    for channel_check = 1:length(Name_Channels)
        if img_info_no(img_idy,3)==channel_check
            img_name{(img_idy+(length(Name_Channels)-channel_check))/length(Name_Channels),channel_check}=char(img_names_raw(ii));        # <-----line 41#
        end
    end
end
        

Answer 1

[James Tursa]

Type the following at the command line:

dbstop if error

Then run your code. When the error occurs, the code will pause with all variables intact. Examine img_format to see what it is and then backtrack in your code to figure out why it isn't what you expect.

[CD11]

Thanks for the function! I wasn't able to understand the error from the img_format file, but I adjusted some paramters in a different file that was being referenced (Step_0) and the error was resolved.