Plot a 1D array and a 2D array in a single plot/chart.

[yp96]

I have a 2D data of an image of size 1000x1024 and I have a 1D graph of size 1x1024. How can I plot both of them in a single plot/chart? Both the data are in the form of an array.

[thols]

---

---

Use the PlotImages.Back property of an XY-graph to plot the image: https://zone.ni.com/reference/en-XX/help/371361R-01/lvprop/mxsiggrph_plot_imagesback/

[yp96]

But the data which I have is in 2D array form and the images are generated from a machine and not imported from a file. So every time the code runs, there will be a new image. That's why I need to plot it as an array on another array.

[thols]

---

@yp96 wrote:

But the data which I have is in 2D array form and the images are generated from a machine and not imported from a file. So every time the code runs, there will be a new image. That's why I need to plot it as an array on another array.

---

"2D array form". Is it an RGB image represented as a 2d-array? Then just use "draw flattened pixmap". No need to import a file.

What do you mean by "plot an array on another array"? Can you show us some data and what you want to do, or some code, or pictures?

[yp96]

In the attached image, the generated image can be seen above and the plot below. The image is obtained from the machine in the form of pixel values and then I have done coding to obtain the topmost edge in the image. Now I need to visualize that graph plot over the original image to see how well is the edge detected. I hope this makes it clear what I want to do.

I also attached a VI - trial_plot. It consists of both the image and the plot data.

[Yamaeda]

Why not add the new graph to the 2D one?

/Y

[yp96]

I tried adding using the build array, no results. I only see the image and when I see into properties of the plot, I don't see the tab of Plots to change the color of the line graph. How would you suggest to add it?

[Yamaeda]

You can r-click and Show Legend, if memory serves, there you can set plot properties as color.

/Y

[yp96]

I tried and I didn't see any such option. Could you please show it in the attached VI?

[thols · Accepted solution]

Ah, its an intensity graph. Rarely had to use those. I have attached the simplest solution. Just overlay the XY-graph and make it transparent.