Re: [Help-bash] something about variable.

[Bob Proulx]

lina wrote:
> echo -n "=PEARSON(B2:B43,$i 2:$i 43) "

Using 'echo' with -n isn't portable.  Please consider using 'printf'
for that task instead.  It will do what you want everywhere that you
care about.

> $i2 not work, $i 2 added extra space,
> are there someway to handle the $i2 situation?

The bash documentation says:

       ${parameter}
              The value of parameter is substituted.  The braces are  required
              when  parameter  is  a  positional  parameter with more than one
              digit, or when parameter is followed by a character which is not
              to be interpreted as part of its name.

So use curlies to separate the variable name part from the following
non-variable part.

  $ v=foo
  $ echo ${v}bar
  foobar

And in your case you would use something like this:

  printf "=PEARSON(B2:B43,${i}2:$i 43) "

Bob