In matlab one can do
for i = 2:10
array(i) = array(i-1) + value
end
How can I replicate this in python?
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RSale
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Pedro Brandão
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I'm not very good at matlab, what is `value` here? Is it the old value of `array(i)`? – Expurple Dec 31 '21 at 12:08
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That's just a random value that we want to add to the array in each cycle.! I also don't understand this quite well. I was sent a Matlab script with this on it. Furthermore, I am trying to decipher it and implement it in python. I believe that this is similar to the `array += value` where you have something like `k=k+1` – Pedro Brandão Dec 31 '21 at 12:40
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MATLAB can grow a matrix by simply assigning new indices. With `numpy` you need to initial the array to fill size first. But we need more context to come up with a good `numpy` or python solution. For example `np.cumsum([value1,value2, value3...])`. – hpaulj Dec 31 '21 at 17:51
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Check out Manlais answer, https://stackoverflow.com/a/70560707/7031021 – RSale Jan 03 '22 at 01:06
2 Answers
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In python it will be:
for i in range(1,10):
array[i] = array[i-1] + value
Keep in mind that in python, indexing starts from 0.
Maciej Czarnecki
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1Why `9`? If I understand correctly, matlab's `10` is inclusive, but `range` isn't, so you need `10` here to stop after index 9 (the 10th 0-indexed element) – Expurple Dec 31 '21 at 12:46
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@Expurple, You're right! Thank You for spotting it. Already fixed. – Maciej Czarnecki Dec 31 '21 at 12:53
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You can do something like this in python:
But you should also pay attention to one point: That the number of indexes in Python starts from zero while in MATLAB from one
for i in range(2,10):
array[i] = array[i-1] + value
have a good time!
Reza Tanakizadeh
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