LabVIEW
Plotting of Waterfall in Lab View From The Continuous Data Stream Coming From Interfaced Software RTSA Suite Pro
Hi!
I have interfaced RTSA Suite Pro with Lab View through VISA. I want to plot waterfall graph in Lab View. So, when I asked this question on Aaronia Forums. I got the following reply, you can see in the pic.
They give me command that is giving me continuous Data Stream in Lab View. But they and I both do not know how to plot waterfall graph from that continuous Data Stream. I am sharing the block diagram and its output in Lab View.
Now, I do not know how to proceed further to plot waterfall graph from this data. Kindly guide me.
Thanks.
Hi qureshi,
@qureshi000 wrote:
But they and I both do not know how to plot waterfall graph from that continuous Data Stream. I am sharing the block diagram and its output in Lab View.
You need to split the received string into two parts, as written in this message.
Split at the hashmark, read the first char (4) to know how many chars to read next: "6800".
The remaining chars (should be 6800) need to be converted to "floats" (aka SGL): I recommend to use UnflattenFromString into an array of SGL (no length field, check byte order for reasonable values)…
Hi qureshi,
@qureshi000 wrote:
How can I do it? Explain in detail. It would be better if you explain it by block diagram.
Thanks
Why don't you attach your VI with some received data in an indicator set to default?
Then we could implement our suggestions and even try/debug them…
(When attach a VI please downconvert an older LabVIEW version. I prefer to LV2019.)
Hi qureshi,
like this:
Attention: I skipped the part about reading the number of data elements ("43408") by using a constant at StringSubset: replace this part by correctly parsing the numbers as described in your message above!
Hi qureshi,
@qureshi000 wrote:
Can you please share the pic which also contain name of the blocks used.
You got an image and I already mentioned UnflattenFromString in a previous message!
What else do you need?
It is giving me plot of spectrum. How can I plot waterfall graph from data as shown in figure below.
This pic is only for reference. It is from software which I interfaced with Lab View (RTSA Suite Pro).
Hi qureshi,
@qureshi000 wrote:
It is giving me plot of spectrum.
Yes, that's what you get from your device!
@qureshi000 wrote:
How can I plot waterfall graph from data as shown in figure below.
What I see in this image is a large blueish rectangle with some grid lines: a waterfall plot typically looks like this.
So please show some useful example images!
Btw. LabVIEW comes with a Waterfall plot in the 3DGraph palette…
