Hi, I tried to print an array with a floating point numbers e.g. x[0,0] = 55.123 with the format: printf("%0.04f\n", x[0,0]) But it failed and I got the message: `printf': can't convert Array into Float (TypeError) When I tried printf("%0.04f\n", 55.123) I got the expected aswer: 55.1123 Can anyone tell me how I can print an array with floating point numbers? Thanks in advance, Thiel Chang

on 2008-11-04 11:16

on 2008-11-04 11:50

```
>
Did you mean:
printf("%0.04f\n",x[0][0])
```

on 2008-11-04 12:47

```
On Tue, 04 Nov 2008 11:12:31 +0100, thiel <schang@wxs.nl> wrote:
> Can anyone tell me how I can print an array with floating point numbers?
printf:
[0.1, 2.3, 4.5, 6.7, 8.9].each { |x| printf("%0.04f\n",x)}
0.1000
2.3000
4.5000
6.7000
8.9000
puts and '%':
[0.1, 2.3, 4.5, 6.7, 8.9].each { |x| puts "%0.04f" % x}
0.1000
2.3000
4.5000
6.7000
8.9000
For multidimensional arrays you need to decide in which order you
iterate
over the indices. There's more than one convention to do so. Typical
order
1: The inner loop iterates over the first, the next outermost loop over
the second index, and so on.
Typical order 2: The inner loop iterates over the last, the next
outermost loop over the previous index, and so on.
HTH,
Josef 'Jupp' Schugt
```

on 2008-11-04 15:00

Hi Josef, Many thanks for your advice. Solving the problem with your suggestion was quite trivial (at last :-) ) I ran into problems because I used a wrong multi dimensional array definition from the book B. Preissig and changed it into : -------------------------------------- def Test.mda(width,height) Array.new(width).map!{ Array.new(height) } end x = Test.mda(6,2) # Some test data x[0][0] = 55.123 x[1][0] = 39.234 x[2][0] = 41.897 x[3][0] = 40.456 x[4][0] = 47.234 x[5][0] = 51.567 x[0][1] = 1 x[1][1] = 2 x[2][1] = 3 x[3][1] = 4 x[4][1] = 5 x[5][1] = 6 # And the testprogram x = x.sort {|v1, v2 | v2 <=> v1} for m in 0 .. 5 if x[m][0] >= x[2][0] then printf("Greater %3.3f\n", x[m][0]) else printf("Smaller %3.3f \n", x[m][0] ) end end puts "Smallest value = #{x[5][0].to_s}" ------------------------------------ And it works fine. Best regards, Thiel Josef 'Jupp' Schugt schreef:

on 2008-11-04 15:03

Hi Shourya, Many thanks for your answer. I solved the problem. The reason was I used a wrong multi dimensional array definition. Best regards, Thiel Sarcar, Shourya C (GE Healthcare) schreef: