help needed in plotting XY graph

[farhan]

hello,

basically i am doing particle analysis. so i open an image and perform the particle analysis count. i am interested in the particle count and area of each particle on the image.

after i get these values i want to plot them on the graph. so no of particles on the X axis i.e. starting from 1,2,3 .. 150/n and the then plot the area of each particle on the Y axis in pixels.

it should be straight forward i just tried wiring the particle count on the X axis graph, and area on the Y axis, however no line was drawn.

please help thanks 

[MikeS81]

Hi farhan,

to insert values into the xy graph you have to cluster two arrays and connect the result with the graph. Did you do it? Can you show your code?

Mike

[farhan]

hi MikeS81,

Yes I use a Build XY Graph function which outputs a cluster of 2 elements. it takes in X and Y input which i connect the particle count and pixel measurements. 

I have attached a screenshot of the code.

thanks

[MikeS81]

Hi farhan,

please attach only "real" jpgs or pngs and not renamed bmps. Thanks.

I´m not familiar with all express vi´s, but you connect only one x value. You can also do it without using the express vi.

Hope it helps.

Mike

[farhan]

hello,

i did try using your example however it still does not work. im sure they must be examples where data obtained from particle analysis is shown on graphs.

the problem i am having is the bundle of points to joining to XY graph. can it be that particle count is int32 but the problem is particle measurements which is a 2d array . how do i convert this 2d array to something so it should work on the graph.

[MikeS81]

Hi farhan,

which information from the 2D array do you want to see in your graph?

Mike

[farhan]

ok to simlify things again, i am using the IMAQ particle analysis function and am interested in these outputs:

1. number of particles which is Int32

2. Particle Measurements which is a 2D array.

how should i represent the above data on a XY graph.

[MikeS81]

Hi farhan,

that´s what we see from your image. What type of data contains the 2d Array and how do you want to present it in the graph? What do you wanna see in the graph?

Mike

[farhan]

the 2d array is of particle measurements. i want to see on the x axis the number of particles and then on the y axis for each particle the particle measurement (area in pixels). and should draw a line. and thats about it.

[MikeS81]

Hi farhan,

can you upload a vi which contains a 2d array with your received values?

Try to help.
Mike

Message Edited by MikeS81 on 07-29-2008 01:35 PM