Getting an unknown error on calculating Standard Deviation.
18 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Amit Priyankar
le 19 Juin 2020
Commenté : Hassan Eissa
le 8 Sep 2023
I was trying to calculation using inbuilt Standard Deviation function but getting an error.
I ran the following code
load myfile.mat
std(v)
Error:
Error using var (line 74)
Invalid data type. First input argument must be single or double.
Error in std (line 59)
y = sqrt(var(varargin{:}));
1 commentaire
Atul Upadhyay
le 19 Juin 2020
I can see that the vector you are using has the int8 datatype in it and it contains values from 0 to 100. So, while calculating standard deviation there are chances of overflow.
Typecast the vector v to ‘double’ to get the desired output.
load myfile.mat;
v=double(v);
sd=std(v);
Refer to the following documentation to know more about datatypes in MATLAB.
https://in.mathworks.com/help/matlab/matlab_prog/integers.html
Réponse acceptée
Atul Upadhyay
le 19 Juin 2020
I can see that the vector you are using has the int8 datatype in it and it contains values from 0 to 100. So, while calculating standard deviation there are chances of overflow.
Typecast the vector v to ‘double’ to get the desired output.
load myfile.mat;
v=double(v);
sd=std(v);
Refer to the following documentation to know more about datatypes in MATLAB.
https://in.mathworks.com/help/matlab/matlab_prog/integers.html
0 commentaires
Plus de réponses (2)
Hassan Eissa
le 8 Sep 2023
Compute the maximum value (max), minimum value (min), average value (mean), standard deviation (std) and the variance ( square of the standard deviation) of the variable 'signal
1 commentaire
Hassan Eissa
le 8 Sep 2023
[sample, signal]
Step 1 Compute the Statistics
This file contains a variable called signal that has 730 samples. Compute the maximum value (max), minimum value (min), average value (mean), standard deviation (std) and the variance ( square of the standard deviation) of the variable 'signal'.
% Create the variables below that represent the statistics of the variable signal
%
maxSignal =
minSignal =
avgSignal =
stdSignal =
varSignal =
Voir également
Catégories
En savoir plus sur Digital Filter Analysis dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!