compare decimal numbers - Shell Programming and Scripting

tmxps · #1 11-02-2005

Hi anyone,

i need to compare two decimal numbers

i thought that it could be do it with if but...

So, i'm writing in csh and i really apreciate if anyone can help me

if ( $ppl_kn <= $ppl_wb ) then
echo "############# KNdiscount model has the lowest perplexity"
set ppl_LM_choosed = $ppl_LM_kn
set LM_choosed = $LM_kn
else
echo "############# WBdiscount model has the lowest perplexity"
set ppl_LM_choosed = $ppl_LM_wb
set LM_choosed = $LM_wb
endif

Many thanks

zazzybob · #2 11-02-2005

That should be fine....

Code:

#!/usr/bin/csh -f

set ppl_kn = 7
set ppl_wb = 6

if ( $ppl_kn <= $ppl_wb ) then
  echo "KNdiscount model has lowest perplexity"
else
  echo "WBdiscount model has lowest perplexity"
endif

Works for me...

Also; people are going to yell "Don't use csh for scripting", for good reason too...

Cheers
ZB

tmxps · #3 11-02-2005

Thanks by your quick reply.

however does not work if i make
set ppl_kn = 7.1
set ppl_wb = 6.8
or
set ppl_kn = 7,1
set ppl_wb = 6,8

The numbers i need to compare are not integers.

Thanks anyway.

Perderabo · #4 11-02-2005

ksh88 only has integers. Here is how I solve this problem in ksh88. You get translate the technique to csh. Or you could switch to a real shell.

zazzybob · #5 11-02-2005

Use perl...

Code:

#!/usr/bin/perl

my $ppl_kn = 1.4;
my $ppl_wb = 1.2;

if ( $ppl_kn <= $ppl_wb ) {
   printf "KNdiscount model has lowest perplexity\n";
} else {
   printf "WBdiscount model has lowest perplexity\n";
}

Cheers
ZB

futurelet · #6 11-02-2005

Code:

ruby -e 'puts ($*.first.to_f <= $*.last.to_f) ? 1 : 0' 3.14 9

Output:

1

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