Recursive function not stopping
2 views (last 30 days)
Show older comments
I'm running the following recursive function. By pausing the execution and checking the values, I find that the execution is happening and values are updated. I have a stopping condition and the workspace is even showing me the final matrix once I pause after sometime. But it's not exiting the function after doing that. It keeps on running. I'm not able to figure out why. I call the function using x_1=no_vel_miss(a);
function r = no_vel_miss( x ) %x is my matrix with all data-time and vel as columns
i=1;
flag=0;
flag=sum(isnan(x(:,2)));
if flag==0
r=x; %if there is no missing point, return the matrix
else
while i<=length(x(:,1))
if isnan(x(i,2))
for j=i:-1:1
if x(j,2)==0
prezero=j; %prezero is the nearest zero velocity before missing point
break;
end
end
for j=i:length(x(:,1))
if x(j,2)==0&&x(j+1,2)~=0
postzero=j; %postzero is the nearest zero velocity after which a non-zero velocity occurs
break;
end
end
x_1=cat(1,x(1:prezero,:),x(postzero:length(x(:,1)),:)); %here I'm removing all that data near the missing point as mentioned above
i=prezero;
r=no_vel_miss(x_1);
else
i=i+1;
end
end
end
end
8 Comments
Answers (1)
OCDER
on 18 Jun 2018
Is this what you want to do?
%
% x = [1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20;
% 0 1 3 4 NaN 0 1 2 5 2 0 NaN 4 5 NaN 0 0 3 6 0]';
%
% x = no_vel_miss(x)
%
% x' =
% 1 6 7 8 9 10 11 16 17 18 19 20
% 0 0 1 2 5 2 0 0 0 3 6 0
function x = no_vel_miss( x )
NanIdx = find(isnan(x(:, 2)));
if isempty(NanIdx)
return
end
DelLoc = zeros(size(x, 1), 1, 'logical');
for k = 1:length(NanIdx)
PreZero = find(x(1:NanIdx(k)-1, 2) == 0, 1, 'last');
if isempty(PreZero)
PreZero = 1;
end
PostZero = find(x(NanIdx(k)+1:end, 2) == 0, 1) + NanIdx(k);
if isempty(PostZero)
PostZero = size(x, 1);
end
DelLoc(PreZero+1:PostZero-1) = 1;
end
x(DelLoc, :) = [];
0 Comments
See Also
Categories
Find more on Entering Commands in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!