Attempted to access xx(1); index out of bounds because numel(xx)=0. & error in the line hist(val_i​n(:,i+2),h​ist_int1);

I'm trying to eliminate spikes from a given set of values (and tried histograms). The bit of code before this seems to work but for context I've put in a bigger piece.

How do I get past the error?

min_val_in_crt=min(val_in(:,i));
max_val_in_crt=max(val_in(:,i));
med_val_in_crt=mean(val_in(:,i));
diff_in=max((max_val_in_crt-med_val_in_crt)/2, (med_val_in_crt-min_val_in_crt)/2);
for i=1:n-1
   for p=1:size(val_in, 1)
        if abs(val_in(p,i) - med_val_in_crt) < diff_in
       val_in(p,i) = med_val_in_crt;
        end
    end
end

if isempty(next_fig3)
    next_fig3=next_fig2+1;
end

figure(next_fig3);

for i=0:n-2
    if rem(i,6)==0 figure(i/6+next_fig3);
        next_fig3=i/6+next_fig2+1;
    end
    subplot(6,1,rem(i,6)+1);
    plot(val_in(:,1),val_in(:,i+2),'r');
end

if isempty(next_fig4)
    next_fig4=next_fig3+1;
end

figure(next_fig4);

for i=0:n-2
    if rem(i,6)==0 figure(i/6+next_fig4);
        next_fig5=i/6+next_fig4+1;
    end
    min_val_in_crt1=min(val_in(:,i+2));
    max_val_in_crt1=max(val_in(:,i+2));
    hist_int1=min_val_in_crt1:abs((max_val_in_crt1 -min_val_in_crt1)/gran):max_val_in_crt1;
    subplot(6,1,rem(i,6)+1); 
    hist(val_in(:,i+2),hist_int1);
    A1(:,i+1)=hist(val_in(:,i+2),hist_int1);
end

Answer 1

[Walter Roberson]

hist_int1 might be empty. I suggest replacing

hist_int1=min_val_in_crt1:abs((max_val_in_crt1 -min_val_in_crt1)/gran):max_val_in_crt1;

with

hist_int1 = linspace(min_val_in_crt1, max_val_in_crt1abs, gran+1);

assuming that gran is a positive integer.