MATLAB Answers

How to run if and exist ?

11 views (last 30 days)
Luca
Luca on 9 May 2021
Commented: Luca on 15 May 2021 at 18:10
Hi,
I'm trying to run this loop.
for year= 1962:2016
for id=10000:93436
sub_regress = subsetPCA(subsetPCA.ID ==id & subsetPCA.years==year,:);
if size(sub_regress,1) ~= 0
[~, IDPCA1, yearsPCA1]= findgroups(sub_regress.ID, sub_regress.years);
[~, IDPCAd, datesPCA1] = findgroups(sub_regress.ID, sub_regress.dates);
modeltest = fitlm(sub_regress, 'RET~PC1+PC2+PC3+PC4+PC5');
RES_PCA = modeltest.Residuals.Raw;
RES_PCAtbl= table(IDPCAd,datesPCA1, RES_PCA);
RES_PCAtbl.Properties.VariableNames([1 2]) = {'ID' 'dates'};
if exist final_residuals
final_residuals =[final_residuals; RES_PCA];
else
final_residuals = RES_PCA;
end
end
end
end
For some reason it is not acepting final_residual in the if exist function with if statement? Does someone know how what the problem is?
Thank you in advance
  1 Comment
Jonas
Jonas on 9 May 2021
try running it using bracket like
a=5;
exist('a','var')

Sign in to comment.

Accepted Answer

VBBV
VBBV on 9 May 2021
Edited: VBBV on 9 May 2021
final_residuals = []
for year= 1962:2016
for id=10000:93436
sub_regress = subsetPCA(subsetPCA.ID ==id & subsetPCA.years==year,:);
if size(sub_regress,1) ~= 0
[~, IDPCA1, yearsPCA1]= findgroups(sub_regress.ID, sub_regress.years);
[~, IDPCAd, datesPCA1] = findgroups(sub_regress.ID, sub_regress.dates);
modeltest = fitlm(sub_regress, 'RET~PC1+PC2+PC3+PC4+PC5');
RES_PCA = modeltest.Residuals.Raw;
RES_PCAtbl= table(IDPCAd,datesPCA1, RES_PCA);
RES_PCAtbl.Properties.VariableNames([1 2]) = {'ID' 'dates'};
A = exist('final_residuals')
if A
final_residuals =[final_residuals; RES_PCA];
else
final_residuals = RES_PCA;
end
end
end
end
  1 Comment
Luca
Luca on 15 May 2021 at 18:10
Thank you it worked

Sign in to comment.

More Answers (0)

Tags

Products


Release

R2021a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by