matplotlib-users Mailing List for matplotlib

imshow is for displaying arrays as images/rasters.

plot is for showing data/functions as points and lines.

See the gallery for imshow:
http://matplotlib.org/gallery.html#images_contours_and_fields

On Fri, May 29, 2015 at 4:12 AM, Amit Saha <ami...@gm...> wrote:

> Hi all,
>
> I  am trying to understand if there is a way to compare how plot() and
> imshow() works for the case where I am not using imshow() to display
> an image.
>
> Via the plot() function, I am specifying the points that I want to
> plot and also optionally the color that i want the points to be in.
> For example, plot([1, 2, 3], [2, 3, 4], 'ro') will create a plot with
> those points colored "red". Via the imshow() function, we specify the
> color (or intensity) of each point and a figure is created with the
> points colored accordingly. Sure, imshow() allows me to color each
> point differently.
>
> Is there a way to relate them?
>
> Also asked on StackOverflow:
> http://stackoverflow.com/questions/30527811/plot-and-imshow-relationship
>
> Thanks,
> Amit.
>
>
> --
> http://echorand.me
>
>
> ------------------------------------------------------------------------------
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>

It seems like it is a conflict of libraries...I've zeroed in to these two
errors:

/usr/include/unistd.h:496:75: error: conflicting declaration of C function
'void swab(const void*, void*, ssize_t)'

and

/usr/include/stdlib.h:144:13: note: previous declaration 'void swab(const
char*, char*, ssize_t)'

I executed a find command and here's what came up:

~>sudo find / -name stdlib.h
*/opt/csw/include/c++/4.9.2/tr1/stdlib.h*
/opt/solarisstudio12.4/lib/compilers/include/CC/gnu/stdlib.h
/opt/solarisstudio12.4/lib/compilers/include/CC/stlport4/stdlib.h
/opt/solarisstudio12.4/lib/compilers/CC-gcc/include/c++/4.8.2/tr1/stdlib.h
*/usr/include/stdlib.h*

>From what it seems, it's calling stdlib.h from the /usr/include folder when
it should be calling it from /opt/csw/include. I'm going to look into
setup.cfg (that or perhaps hack setup.py) and see if it's at all possible
to change it so that it looks in the right one, and then I'll try building
it again.

On Thu, May 28, 2015 at 1:50 PM, Eric Firing <ef...@ha...> wrote:

> On 2015/05/28 3:13 AM, Bryan Williams wrote:
> > I have gcc on the box. I also installed the C compiler for Solaris (cc),
> > but I couldn't seem to find an option to switch it so that it uses cc
> > rather than gcc.
>
> Maybe you can do this with an environment variable?
>
> export CC=/usr/bin/cc
>
> It does look like there is a problem with scrambled environments.  The
> redefinition warning looks potentially troublesome; and the error looks
> like a conflict between two versions of the standard C library.
>
>  From "man swab" on Solaris:
>
> NAME
>       swab - swap bytes
>
> SYNOPSIS
>       #include <stdlib.h>
>
>       void swab(const char *src, char *dest, ssize_t nbytes);
>
>    XPG4, SUS, SUSv2, SUSv3
>       #include <unistd.h>
>
>       void swab(const void *restrict  src,  void  *restrict  dest,
>       ssize_t nbytes);
>
> I think you want the second version, consistently, but something is also
> hitting the first version.
>
> Maybe "XPG4" or one of the other 4 options needs to be defined when each
> library is compiled with /usr/bin/cc?  I think the stdlib declaration is
> old; the unistd version is more modern.
>
> That's all very vague, I know.  Obviously, I don't actually know how to
> solve the problem.
>
> Eric
>
>
>
>
> ------------------------------------------------------------------------------
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>

Hi all,

I  am trying to understand if there is a way to compare how plot() and
imshow() works for the case where I am not using imshow() to display
an image.

Via the plot() function, I am specifying the points that I want to
plot and also optionally the color that i want the points to be in.
For example, plot([1, 2, 3], [2, 3, 4], 'ro') will create a plot with
those points colored "red". Via the imshow() function, we specify the
color (or intensity) of each point and a figure is created with the
points colored accordingly. Sure, imshow() allows me to color each
point differently.

Is there a way to relate them?

Also asked on StackOverflow:
http://stackoverflow.com/questions/30527811/plot-and-imshow-relationship

Thanks,
Amit.


-- 
http://echorand.me