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## Re: counting totals in square grids (meshgrid)

**From**: |
Jaroslav Hajek |

**Subject**: |
Re: counting totals in square grids (meshgrid) |

**Date**: |
Mon, 14 Dec 2009 08:13:15 +0100 |

On Mon, Dec 14, 2009 at 8:05 AM, Isak Delberth Davids
<address@hidden> wrote:
>* Dear all,*
>
>* I would like to plot some 3D color-coded density plots, using*
>* meshgrid. I have this grid on a 2D surface (generated with meshgrid).*
>* Now, I am absolute stuck when it comes to counting the number of*
>* points falling in each grid --- I would like to use that number as*
>* some kind of a density per grid, which constitutes the 3rd dimension.*
>* Here I have a little demonstration:*
>
>* clear, clc, clf;*
>* x=rand(10,1)*10;*
>* y=rand(10,1)*10;*
>* [X Y] = meshgrid(0:1:10,0:1:10);*
>* Z = .......... %must be the number of points in each square grid*
>* meshgrid(X,Y,Z)*
>
>* How should Z be defined such that it counts the number of values in*
>* each grid of width 1?*
>
>* isak.davids*
>
First, you should realize that while X and Y are 11x11, there are only
10x10 squares in your grid, so Z will be 10x10.
Is this what you want?
--
RNDr. Jaroslav Hajek
computing expert & GNU Octave developer
Aeronautical Research and Test Institute (VZLU)
Prague, Czech Republic
url: www.highegg.matfyz.cz

**counting totals in square grids (meshgrid)**, *Isak Delberth Davids*, `2009/12/14`
**Re: counting totals in square grids (meshgrid)**,
*Jaroslav Hajek* **<=**
**Re: counting totals in square grids (meshgrid)**, *Isak Delberth Davids*, `2009/12/14`
**Re: counting totals in square grids (meshgrid)**, *Jaroslav Hajek*, `2009/12/14`
**Re: counting totals in square grids (meshgrid)**, *Isak Delberth Davids*, `2009/12/14`
**Re: counting totals in square grids (meshgrid)**, *Jaroslav Hajek*, `2009/12/14`
**Re: counting totals in square grids (meshgrid)**, *Isak Delberth Davids*, `2009/12/14`
**Re: counting totals in square grids (meshgrid)**, *Jaroslav Hajek*, `2009/12/14`
**Re: counting totals in square grids (meshgrid)**, *Isak Delberth Davids*, `2009/12/14`
**Re: counting totals in square grids (meshgrid)**, *Jaroslav Hajek*, `2009/12/14`
**Re: counting totals in square grids (meshgrid)**, *Isak Delberth Davids*, `2009/12/14`