Left 6 digits of a 9 digit number that could be incomple

I have a column of 9 digit numbers that I want to trim to the left 6 digits.For example,931146104 should be 931146. Sometimes for small numbers the 9 digit column contains numbers that are fewer than 9 digit . for example 3100 should be 000003100 and the 6 digit number is consequently 000003. This manipulation is far beyond my basic matlab skills. I am wondering how to compute the 6 digit number in this context.

Answer 1

[Walter Roberson]

In vectorized form,

num2str( floor(n(:)/10^3), '%.06d')

[wesso Dadoyan]

it is giving me each digit in a column.

[Walter Roberson]

Is that a problem? You have a fixed number of columns of output (that is, 6), and you did not say what data type you need to be output.

If you need a cell array of character vectors, then

cellstr( num2str( floor(n(:)/10^3), '%.06d') )

[wesso Dadoyan]

thanks