topic Re: Bit field and Graphic library on Linux in Intel® Fortran Compiler

Bit field and Graphic library on Linux

brunocalado — Fri, 19 Jun 2009 22:26:16 GMT

I'm using the intel fortran compiler 11 on linux.

1 - ) Bit field
I want to create a long bit chain. Use the bits on Integer (Kind=8) is not enough. It must have the range 1-10000000.

The way I founded is create a array of logical
LOGICAL (KIND=1) :: gene( 10000 )

But it is very ugly because it allocated 10000 bytes instead bits. And I can't use the intrisic bit functions.

Is there a way of make true bit field?

2 - ) I tried to use the graphic library but it is just available for windows. Please make it work for linux.

tks

Re: Bit field and Graphic library on Linux

eliosh — Sat, 20 Jun 2009 09:08:44 GMT

Quoting - brunocalado

1) I am afraid you will have to allocate an array of integers and access the bits manually.
2) not clear what library is "*the* graphics library" :)

Re: Bit field and Graphic library on Linux

brunocalado — Sun, 21 Jun 2009 21:36:30 GMT

Quoting - eliosh

1) I am afraid you will have to allocate an array of integers and access the bits manually.
2) not clear what library is "*the* graphics library" :)

There's functions for graphical interface. like arc pixels But they are available only for windows

INTEGER :: Array(5,10)
INTEGER :: tmp(5)

Array = 1
tmp = 2

Array(:,10) = tmp

Why the last line doesn't work?

Re: Bit field and Graphic library on Linux

Steven_L_Intel1 — Sun, 21 Jun 2009 23:43:17 GMT

How does it "not work"?

Re: Bit field and Graphic library on Linux

brunocalado — Mon, 22 Jun 2009 01:32:59 GMT

Quoting - Steve Lionel (Intel)

How does it "not work"?

But I did the same here. Look:

LOGICAL (KIND=1) :: gene(5, 10)
INTEGER :: Index(10)

gene(:,:) = gene(:,Index)

Output:
Index Gene before (gene(:,:) = gene(:,Index))
1 : T F F T T
2 : T T T T T
3 : T T T T T
4 : T T F T T
5 : F T F T T
6 : F F F T T
7 : T F T F F
8 : T F T T T
9 : F F T T F
10 : T T F T F

Index before -> new Index Gene after (gene(:,:) = gene(:,Index))
1 -> 5 F T F T T
2 -> 1 T F F T T
3 -> 2 T T T T T
4 -> 3 T T T T T
5 -> 6 F F F T T
6 -> 8 T F T T T
7 -> 9 F F T T F
8 -> 4 T T F T T
9 -> 10 T T F T F
10 -> 7 T F T F F

The genes must change. The second (T T T T T) should go to the first position. The third (T T T T T) to the second...

It is the same thing, no?

Re: Bit field and Graphic library on Linux

eliosh — Mon, 22 Jun 2009 09:42:05 GMT

Quoting - brunocalado

But I did the same here. Look:

LOGICAL (KIND=1) :: gene(5, 10)
INTEGER :: Index(10)

gene(:,:) = gene(:,Index)

Output:
1 : T F F T T
2 : T T T T T
3 : T T T T T
4 : T T F T T
5 : F T F T T
6 : F F F T T
7 : T F T F F
8 : T F T T T
9 : F F T T F
10 : T T F T F

1 -> 5 F T F T T
2 -> 1 T F F T T
3 -> 2 T T T T T
4 -> 3 T T T T T
5 -> 6 F F F T T
6 -> 8 T F T T T
7 -> 9 F F T T F
8 -> 4 T T F T T
9 -> 10 T T F T F
10 -> 7 T F T F F

The genes must change. The second (T T T T T) should go to the first position. The third (T T T T T) to the second...

It is the same thing, no?

What can we see from this example ?????
Show the content of gene and Index before the permutation and after it.

Re: Bit field and Graphic library on Linux

brunocalado — Mon, 22 Jun 2009 21:05:56 GMT

updated

Re: Bit field and Graphic library on Linux

eliosh — Tue, 23 Jun 2009 05:35:56 GMT

Quoting - brunocalado

updated

Your results look perfectly reasonable.
Note that the index change 1->5 means that the 5th element moves to the first position. Similarly, 2->4 means that the fourth element becomes the second.

For some reason you expect them to move in "reverse" direction.

Re: Bit field and Graphic library on Linux

brunocalado — Tue, 23 Jun 2009 21:10:55 GMT

Quoting - eliosh

Thank you.

This is what I want.
gene(:,Index) = gene(:,:)