calculating average value for matrix

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kash
kash 2012-2-6
编辑： Junaid Qadir 2018-4-24
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

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采纳的回答

Andrei Bobrov
Andrei Bobrov 2012-2-7
out = abs(A-B)./A

更多回答（3 个）

BHANESH BHADRECHA
% 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 个评论
BHANESH BHADRECHA
BHANESH BHADRECHA 2015-9-7
编辑：BHANESH BHADRECHA 2015-9-7
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 2015-9-7
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 2012-2-7
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 个评论
kash
kash 2012-2-7
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 2018-4-24
编辑：Junaid Qadir 2018-4-24
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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