How to make a 3-d graph from 3 1-D arrays containing x ,y cartesian coordinates and intensity values

[Billy_JJ]

Thanks for the suggestion, i didnt manage to make it work .

I am attaching the stem plot and my date in excel file . The columns are x y and intensity respectively.

thanks

[Zwired1]

Try the attached.  I used a 3D scatter plot (vector) with the camera pointed straight down at the XY plane, small point size, and some transparency to help show obscured points.  I added a couple Booleans -- the first will add some variance to your x values so they don't line up/obscure each other so much and the second will rotate the image so that it looks more like your "original data" image from earlier in the thread.  If you set your Y axis range to clip the upper outliers it will appear even more "round" and look somewhat more like your original.

Is it possible that your data has been compromised somehow?  Your x values are all integer and the original data image suggests that was not always the case. 

[Billy_JJ]

Thanks for the quick reply.

I will try this ASAP. In general the Xdata are not integers, only in this particular case they were integers.

Many thanks

[GerdW]

Hi Billy,

to display values vs. coordinates I like to suggest using an intensity graph as demonstrated here…

[Billy_JJ]

Gerd Zwired and others  thanks a lot for your comments and suggestions .

Gerd: i thought of using  a intensity graph but as far as i know it requires a 2d array where the collumn and row index rapresent a ''pixel '' of the image and the value of the array is the intensity . In my case i have 3 1d arrays of negative and positive non integers values . is there a way to use this number as indeces for the 2D array ?

Zwired: THis vi works a treat but i could more or less visualise my results with stem plot.

What i need is to get a plot that looks like that for the 1st data you saw in the post (circlular dot on the plot)

and for the 2nd set of data which are in the excel file i need a contour plot like this

and after that a surface plot like this

I found these  2 from a presentation and they were madein mathematica.

Any suggestions accepted

Thanks again for your time

[GerdW]

Hi Billy,

is there a way to use this number as indeces for the 2D array ?

You know the coordinates of each pixel. What is the problem to fill a 2D array with your pixel values based on those coordinates?

The wafer prober in my link above also gave just coordinates and corresponding measurement values…

[Billy_JJ]

the problem is that these values are not integers and i cant index a 2d array with them .

[GerdW]

Hi Billy,

chip positions on a wafer are almost always non-integers when measured in mm - and still I could use a 2D array…

You can:

- increase 2D array size to simulate a finer resolution

- use some (bilinear) interpolation to fill gaps…

[Billy_JJ]

Thanks for the response, i ll try this way because the 3d plots are more difficult to implement and maybe more hungry for memory as they ll have to show in every iteration.

Many thanks