How to add iteration in a string (make multiple strings using iterations without indexing) ?

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Haisam Khaled
Haisam Khaled 2021-10-24
评论： Haisam Khaled 2021-10-26
I have been wondering for a loooong time how to acheive this. (I am a beginner by the way so please bear with me)
The problem is shown in the sample code below. I want the numerical "i" to be used in the string to output: "png1", "png2", and so forth.
Of course the code doesn't work.
I know of a way; to make a matrix in advance with string then access the matrix but this won't work with a while loop.
I thank you so much in advance.
for i = 1:4
matlab = "png(i)"
end

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采纳的回答

the cyclist
the cyclist 2021-10-25
编辑：the cyclist 2021-10-25
Ran in:
Here is one way:
for i = 1:4
matlab = sprintf("png%d",i)
end
matlab = "png1"
matlab = "png2"
matlab = "png3"
matlab = "png4"
Here is another, but wanted to show the first way, which can be more versatile for other ways to build strings and/or character arrays.
for i = 1:4
matlab = "png"+i
end
matlab = "png1"
matlab = "png2"
matlab = "png3"
matlab = "png4"
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Image Analyst
Image Analyst 2021-10-25
@Steven Lord, neat trick. Good to know. Thanks for sharing.
matlab is a reserved variable name so he should use a different variable name. Just type matlab on the command line then dot and and the tab key to see all the methods and properties of the matlab object/class. Another neat trick.
Haisam Khaled
Haisam Khaled 2021-10-26
@Image Analyst DUUUDE this was the one that started it all, I saw it once somewhere, but somehow forgot it and no matter what I tried, I never thought of this one. THANK YOU AGAIN, now I have immense knowledge <3

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更多回答（1 个）

Image Analyst
Image Analyst 2021-10-25
If I understand you correctly you want to dynamically/programmatically create named variables and then access them later by that created name. The reasons against this are discussed in the FAQ:
https://matlab.fandom.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2C_A10_in_a_loop.3F
  1 个评论
Haisam Khaled
Haisam Khaled 2021-10-25
Hey man, first of all, I am a big fan of you, you answered many questions of other people that I benefitted a lot from.
Second, I know my mind is that of a beginner and yours is so advanced and much smarter than me. I didn't explain the problem well, regaardless someone understood my stupid explanation and provided a solution, I thank you soooo much for your effort.
P.S. this article was helpful <3

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