grayscale grid color changing

[ssddii]

Hi ,

I need to make this simulation of sensor network nodes energy levels . As the node energy decreases its corresponding spot on grid changes its color. I would like to plot each node on a grid defined by node's X and Y values . I also want to graphically color each node in gray -scale , so that as the energy value lowers the color dims.I have attached the representation of nodes on a gray scale grid. how acn i draw this grid and how can i periodically change its color as energy values changes.

Please, provide me with the starting point and clues 🙂

thanking you in advance

SDI

[BillMe]

Take a look at the intensity chart examples under "Help...Find Examples..."

[ssddii]

I have looked at the example and for a a newbie its complicated ... I have worked with simple file read and write etc.

I have a file in which i have  three columns

Xaxis            Yaxis               Energy

0                    0                      200

0                   1                       250

5                   3                       500

6                   3                       490

Now i want to plot energy value corresponding to x,y coordinates (since values are logged in in random fashion , not by an arraned array format) on Intensity chart grid

Can you please guide me with suitable blocks i should use for sorting such data ?

I am waiting for the help

Thanks alot

[BillMe]

---

@ssddii wrote:

I have looked at the example and for a a newbie its complicated ... I have worked with simple file read and write etc.

I have a file in which i have  three columns

Xaxis            Yaxis               Energy

0                    0                      200

0                   1                       250

5                   3                       500

6                   3                       490

Now i want to plot energy value corresponding to x,y coordinates (since values are logged in in random fashion , not by an arraned array format) on Intensity chart grid

Can you please guide me with suitable blocks i should use for sorting such data ?

I am waiting for the help

Thanks alot

---

Then look at a 3D graph. And which is it you want to do? Plotting or sorting?

[ssddii]

If i can directly map my energy value for each coordinate set on a 3D graph  like

0,0 location has corresponding energy value

then i dont need to sort ..

I am asking for sorting as my data is logged randomly

How can i plot intensity (energy value) of the x and y coordinates easily

[BillMe]

Sorry, but all your examples are already sorted. Do you mean you get some random x,y,z point? What do you mean by "logging data randomly"? Please post some code to show what you are trying to do.

[ssddii]

What i want to do is that since i get randomly logged values like

 x     y    intensity

1      1    8

1      0    4

0      0    1

0      1    3

I want that when i have arranged columns

0   0    1

0   1    3

1   0    4

1   1    8

so that i directly take intensity column

1  ----------------> corresponds to 0,0 pixel on intensity graph

3

4

8

and reshape my array accordingly to map

so i use reshape array of row size 2 and column size of 2 in figure

[BillMe]

So you should sort the array then. You can put each X, Y and Z values in a cluster (in that order) building an array of clusters, then use the Sort Array function on the array of clusters. Then unbundle the values and write to your intensity graph. No need to reshape.

[ssddii]

Bill

Can u show me an example code ? It would b nice of u ?

[BillMe · Accepted solution]

Something like this:

You can substitute the constant 2D array with your data from file. I assumed X,Y,Z(energy).