Variable in input prompt

I am trying to have a counter for the specific object the data of which is currently being entered.

I tried:

for n = 1:10
    input_matrix(2:3,n) = input(['Enter the Mass and Volume in brackets [Mass Volume] of Object # ' n '']);
    dens(n) = input_matrix(2,n) / input_matrix(3,n);
end

but it shoes a Box instead of n. Please help, thank you.

Answer 1

[Star Strider]

Use a sprintf call:

input_matrix(2:3,n) = input(sprintf('Enter the Mass and Volume in brackets [Mass Volume] of Object # %d: ', n))

[Musaddiq Sajjad]

Hey it works now. Thank you so much! :)

out of curiosity, why was it showing a box?

[Star Strider]

My pleasure!

The box is an unprintable character. That has to do with mapping ‘n’ to the ASCII character codes. If ‘n’ does not match a printable character, a box of some sort appears in its place.

If my Answer helped you solve your problem, please Accept it!

Answer 2

[the cyclist]

You would need to convert the number to a string to display it. Closest to your syntax would be

input(['Enter the Mass and Volume in brackets [Mass Volume] of Object #',num2str(n)])

but preferable would be

input(sprintf('Enter the Mass and Volume in brackets [Mass Volume] of Object #%d: ',n))

[Musaddiq Sajjad]

Thank you, the sprintf works like a charm.