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);

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Irina
Irina 2015-12-13
回答： Walter Roberson 2015-12-13
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

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回答（1 个）

Walter Roberson
Walter Roberson 2015-12-13
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.

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