Using intensity graph

[kengkc]

Hi,

     Currently, I have some problem using the intensity graphs. I am using the Time frequency toolbox in Labview. Currently, I am having a problem where I needed to plot the spectrogram of the signal. I have tried to maintain a plot of spectrogram at 0 to 4s and another at 4s to 8s. I am trying hard to plot two graph together, to form a plot of 0s to 8s, in the spectrogram. Furthermore, the time axis will continue to increases at 4s interval with updated spectrogram. I wonder how could i achieved in having two spectrogram with two different time interval to display a common plot? Thanks a lot for advice.

Rdgs

kengkc 

[vernyew.lim · Accepted solution]

Hi kengkc,

Correct me if I am wrong, but are you saying that you have the data for the first 4 seconds of your acquisition (t = 0 to 4) and the next 4 seconds of your acquisition (t = 4 to 😎 and you want to combine them into one plot? I presume since you were able to plot them in an intensity graph to begin with, that they are already in arrays.

If that is what you want to do,  you can easily concatenate your arrays using the Build Array function (this means to append one array to the end of another). Add your Build Array function from the Array subpalette, and make sure you right click it and choose Concatenate Arrays so that you dont get more dimensions in your resultant array. Then expand the Build Array function so that you can wire your arrays into it.

Please refer to the attached screenshot for an idea of what I mean.

Hope this helps.