I want to double numbers that are less than the given parameter. What do I need to change

Question

Kevin Carty 2020-2-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/506942-i-want-to-double-numbers-that-are-less-than-the-given-parameter-what-do-i-need-to-change

评论： Jackson 2022-12-9

function dataSamples = AdjustMinValue(numberSamples, userSamples, minValue)
% numberSamples: Number of data samples in array dataSamples
% userSamples : User defined array
% minValue     : Minimum value of any element in array 
    % Write a for loop that iterates from 1 to numberSamples to double any element's 
    % value in dataSamples that is less than minValue 
    for i = 1:numberSamples
        if userSamples(i) > minValue
            dataSamples = userSamples * 2
        end
            
        
    end
    
    
end

This code doubles all user samples. It should only double numbers less minValue.

Ex.) if minValue = 10 then dataSamples [2,12,9,20] becomes [4,12,18,20]

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Answer 1

Giuseppe Inghilterra 2020-2-22

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编辑：Giuseppe Inghilterra 2020-2-22

在 MATLAB Online 中打开

Your function will be:

function dataSamples = AdjustMinValue(numberSamples, userSamples, minValue)
% numberSamples: Number of data samples in array dataSamples
% userSamples : User defined array
% minValue     : Minimum value of any element in array 
    % Write a for loop that iterates from 1 to numberSamples to double any element's 
    % value in dataSamples that is less than minValue 
    for i = 1:numberSamples
        if userSamples(i) > minValue
            dataSamples(i) = userSamples(i);
        else
            dataSamples(i) = userSamples(i)*2;
        end       
    end
    
    
end

However, you don't need a for loop, you can just run following one-line code based on your last example:

dataSamples(dataSamples<minValue) = dataSamples(dataSamples<minValue)*2;

If we applied to your function, it becomes:

function dataSamples = AdjustMinValue(numberSamples, userSamples, minValue)
    dataSamples = userSamples;
    dataSamples(dataSamples<minValue) = dataSamples(dataSamples<minValue)*2;    
end

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Jackson 2022-12-9

在 MATLAB Online 中打开

for i = 1:numberSamples
        if userSamples(i) >= minValue
            dataSamples(i) = userSamples(i);
        else
            dataSamples(i) = userSamples(i)*2;
        end       
    end
    
    
end