calculating average value for matrix

35 次查看（过去 30 天）
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

请先登录，再回答此问题。

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

请先登录，再进行评论。

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

请先登录，再进行评论。

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;

类别

在 Help Center 和 File Exchange 中查找有关 Sparse Matrices 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by