using variable inside input function
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I am trying to get user input for node coordinates. For some reason the ouput in the command window does not show the variable number, but instead a square:
Input
for i =1:2
x(i)=input(['coordinate for x ' i ' in metres: ']);
end
Output
coordinate for x in metres:
1 个评论
Dr. Kelsey Joy
2021-11-27
编辑：Dr. Kelsey Joy
2021-11-27
num2str(i) so it doesn't just convert the number to a character position
I agree sprintf or fprintf may be a better approach.
(refer to this example with fprintf: https://www.mathworks.com/matlabcentral/fileexchange/102644-educational-building-arrays-with-for-loops-d-d?s_tid=prof_contriblnk)
采纳的回答
Walter Roberson
2019-1-19
['coordinate for x ' i ' in metres: ']
Concatenation between a character and a numeric value is define the same as if you had done
['coordinate for x ', char(i), ' in metres: ']
char(1) is the unprintable SOH (Start of Header) character, and char(2) is the unprintable STX (Start Of Text) character.
You should look at sprintf(). Or switch to string objects:
"coordinate for x " + i + " in metres: "
is well defined as formatting the number as text (according to ill-defined rules.)
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