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

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Engr.Syed Hassan Iqbal Shah
移动：Voss 2024-6-17
modify v1 so that any value less than 4 is replaced with the value 0. please help me writing code.

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Ganesh
Ganesh 2024-6-15
Ran in:
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

更多回答（1 个）

Voss
Voss 2024-6-15 
v1(v1 < 4) = 0;

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