Thiel Chang
11/4/2008 1:58:00 PM
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:
> <div class="moz-text-flowed" style="font-family: -moz-fixed">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