Writing to a new matrix after filtering outliers form original matrix

Question

Greg B. 2016-3-7

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https://ww2.mathworks.cn/matlabcentral/answers/271929-writing-to-a-new-matrix-after-filtering-outliers-form-original-matrix

评论： Moe_2015 2016-3-7

采纳的回答： Moe_2015

Greetings. I am reading in a matrix of ~10,000 values. I want to go through each element and determine if that value is in between a certain boundary limit. Given a for loop with a nested if-statement, how do I write to a new matrix, 'newdata', other than just printing out the last value in the original matrix, 'data'? My code is below:

clc;
clear all;
close all;
data = load('data');
for i = 1:length(data)
    x = data(i);
    limits = 5;
    if (x < limits) && (x > (limits*-1))
    newdata = [x];
    end
end

Thank you for the help.

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Answer 1

Moe_2015 2016-3-7

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This should work. Basically run another index called "k" as a sum that only increases when the inequalities are satisfied.

clc;
clear all;
close all;
data = load('data');
k=0;
for i = 1:length(data)
    x = data(i);
    limits = 5;
    if (x < limits) && (x > (limits*-1))
        k=k+1;
        newdata(k) = x;
    end
end

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Greg B. 2016-3-7

Thank you, sir! This solution works. I am now iterating through the data matrix and with the 'k' index, I am now writing all the values that meet the inequality to the new matrix, 'newdata'. Great!

Moe_2015 2016-3-7