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Add a number all the the values and log transform them using awk

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# 1  
Old 10-29-2014
Add a number all the the values and log transform them using awk
Hi, is it possible to add a number to all the values in a file and log transform them using awk. thanx in advance


input

Code:
name    c1      c2      c3      c4
r1      0       0.2     0.3     0.4
r2      0       0       0       1
r3      1       0       0       0
r4      0       0       1       1
r5      32      23      11      11

add 1 to every value

Code:
name    c1      c2      c3      c4
r1      1       1.2     1.3     1.4
r2      1       1       1       2
r3      2       1       1       1
r4      33      24      12      12

log2 transform every value

Code:
name    c1      c2      c3      c4
r1      log2(1) log2(1.2)       log2(1.3)       log2(1.4)
r2      log2(1) log2(1) log2(1) log2(2)
r3      log2(2) log2(1) log2(1) log2(1)
r4      log2(33)        log2(24)        log2(12)        log2(12)

divided every value by the sum of that specific row

Code:
name    c1      c2      c3      c4
r1      log2(1)/log2(1)+log2(1.2)+log2(1.3)+log2(1.4)   log2(1.2)/log2(1)+log2(1.2)+log2(1.3)+log2(1.4) log2(1.3)/log2(1)+log2(1.2)+log2(1.3)+log2(1.4) log2(1.4)/log2(1)+log2(1.2)+log2(1.3)+log2(1.4)
r2      log2(1)/log2(1)+log2(1)+log2(1)+log2(2) log2(1)/log2(1)+log2(1)+log2(1)+log2(2) log2(1)/log2(1)+log2(1)+log2(1)+log2(2) log2(2)/log2(1)+log2(1)+log2(1)+log2(2)
r3      ...
r4      ..

# 2  
Old 10-29-2014
Not the slightest attempt from your side?
Try
Code:
awk     'NR==1          {ln2=log(2); print; next}
                        {sum=0
                         for (i=2; i<=NF; i++)
                                {$i=log($i+1)/ln2
                                 sum+=$i}
                         for (i=2; i<=NF; i++)
                                $i/=sum
                        }
         1
        ' OFS="\t" CONVFMT="%.4g" file
name    c1      c2      c3      c4
r1      0       0.2334  0.3359  0.4307
r2      0       0       0       1
r3      1       0       0       0
r4      0       0       0.5     0.5
r5      0.3003  0.2729  0.2134  0.2134

This User Gave Thanks to RudiC For This Post:
quincyjones
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