Bars not lining up correctly on Histogram.vi

[Eric1977]

Hello everyone,

I am trying to get my bars via the Histogram.vi to line up with my X-axis. I have placed three elements in a 1D array of doubles. I have tried for the last three hours to get this right and it is driving me nuts!

Can someone help?

Thanks,

Eric

[altenbach]

If you would use the general histogram, you would have more flexibility. At least wire a larger value to the "intervals" input (currently 10).

[ben64 · Accepted solution]

This is what the help file says:

The histogram is a frequency count of the number of times that a specified interval occurs in the input sequence. The width of the frequency bin is

delta_x = (max–min)/m

where m is the requested number of bins. The centers of each bin are set according to the following equation:

center[i] = min + delta_x/2 + i * delta_x.

With double numbers it gets difficult to solve, you need to offset the min value and adjust for the other X values to be centered. If you can live with it a (far from perfect) workaround is to use a large amount of bins (like 200). This way the bars will look centered even if not exactly.

Ben64

[Eric1977]

ben -  I believe your "far from perfect" workaround will work for what I need. Thank you.