divide every numeric value in table by same number

HI,

I want to divide every numeric value in my table by the same number but some columns have strings and some have numbers. I want to convert every number in the table from cm to m (but not the strings of course)

thanks

Answer 1

[Walter Roberson]

divisor = 2;
T = table(["hello"; "orange"], [1;3], [2; 4])

T = 2×3 table
      Var1      Var2    Var3
    ________    ____    ____

    "hello"      1       2  
    "orange"     3       4  

vt = vartype('numeric')

vt = 
	table vartype subscript:

		Select table variables matching the type 'numeric'

	See Access Data in a Table.

T{:,vt} = T{:,vt} / divisor

T = 2×3 table
      Var1      Var2    Var3
    ________    ____    ____

    "hello"     0.5      1  
    "orange"    1.5      2  

[Davindra Usov]

Perfect. Many thanks.

[Siddharth Bhutiya]

Adding on to Walter's answer. Starting 23a there are a lot of standard arithmetic operations that you can directly do on tables to make similar workflows easier. So in 23a you could also use parens indexing instead of brace to get the same results.

T = table(["hello"; "orange"], [1;3], [2; 4]);
vt = vartype("numeric");
T(:,vt) = T(:,vt) ./ 2

T = 2×3 table
      Var1      Var2    Var3
    ________    ____    ____

    "hello"     0.5      1  
    "orange"    1.5      2  

In your case since you have a table with mixed types there is a little more work to be done, however, if you only had numerics in you table then it would be very simple now.

T = table([1;3],[2;4]);
T = T./2

T = 2×2 table
    Var1    Var2
    ____    ____

    0.5      1  
    1.5      2  

You can read more about math operations on tableshere.

[Walter Roberson]

@Siddharth Bhutiya -- thanks, that looks useful!