modify v1 so that any value less than 4 is replaced with the value 0. Please help me making code.

modify v1 so that any value less than 4 is replaced with the value 0. please help me writing code.

[Voss]

v1(v1 < 4) = 0;

Answer 1

[Ganesh]

Hi @Engr.Syed Hassan Iqbal Shah,

v1 = randi([1 6],1,10) % Example data

v1 = 1x10

4 6 5 2 4 1 1 2 1 1

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% Replace any value less than 4 with 0
v1(v1 < 4) = 0

v1 = 1x10

4 6 5 0 4 0 0 0 0 0

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We use "vector indexing" to achieve this.

When you apply a "condition" on an array, the result will be a logical array where, the corresponding indices in the result will be a 1 or a 0. You can use the result array to apply it back on v1 and modify the values where the "logic" holds true. You can use this to compare an array to a value, or even two equal sized arrays and their corresponding index values! You can find more on this using the following link:

https://www.mathworks.com/help/matlab/math/array-indexing.html#:~:text=col%20%3D%202-,Indexing%20with%20Logical%20Values,-Using%20true%20and

[Ganesh]

Importantly, all of this would be covered in the free Self Paced Online Course, MATLAB Onramp. It takes only about two hours, a fair tradeoff to asking a question here and getting the answer an hour later.

https://matlabacademy.mathworks.com/details/matlab-onramp/gettingstarted?s_tid=srchtitle_site_search_1_matlab%20onramp

[Engr.Syed Hassan Iqbal Shah]

thanks

Answer 2

[Voss]

v1(v1 < 4) = 0;