calculating average value for matrix

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kash
kash el 6 de Feb. de 2012
Editada: Junaid Qadir el 24 de Abr. de 2018
I have a matrix of size 50x3
i want to find the average for each value by calculating recall and precision
is it possible,if so what are all the variables needed
please help

Respuesta aceptada

Andrei Bobrov
Andrei Bobrov el 7 de Feb. de 2012
out = abs(A-B)./A

Más respuestas (3)

BHANESH BHADRECHA
BHANESH BHADRECHA el 7 de Sept. de 2015
% suppose name of the matrix is 'm'
[a,b]=size(m);
s=sum(m); % sum of all columns
total=sum(s); % total sum
avg=total/(a*b);
  2 comentarios
BHANESH BHADRECHA
BHANESH BHADRECHA el 7 de Sept. de 2015
Editada: BHANESH BHADRECHA el 7 de Sept. de 2015
example let
m =
1 2 3
4 5 6
7 8 9
[a,b]=size(m) will give a=3 and b=3,
now s=sum(m) will be s= 12 15 18
total = 12+15+18 = 45
avg= 45/9 = 5
Walter Roberson
Walter Roberson el 7 de Sept. de 2015
For the operation you are doing, mean2(m) does everything. This operation is, though, not what the Question is asking about, which is about Recall and Precision

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Aravin
Aravin el 7 de Feb. de 2012
mean of each value can't be calculated but you can get average of each column or row.
mean(M,1) % mean of each column
mean(M,2) % mean of each row
but to get precision and recall. You have to provide more information. Like precision in what and recall of what ?
  1 comentario
kash
kash el 7 de Feb. de 2012
I have two matrices of 50x3,A and B
A is the original matrix
B is the matrix after performing some operation
now i sit possible to calculate precision and recall for B matrix,the accuracy for each value

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Junaid Qadir
Junaid Qadir el 24 de Abr. de 2018
Editada: Junaid Qadir el 24 de Abr. de 2018
clc
close all
clear all
N=9;
M=5;
Accum=zeros(M,1);
for i= 1:N
x=i+1;
%x= randn(M,1);
Accum= Accum+x;
end
Avg= Accum/N;

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