Clear Filters
Clear Filters

Compare two datasets of different units

5 views (last 30 days)
So I have two datasets
Set 1 contains values stored as 575x1 double, in the unit of kBq/cc, it is measured each half second
Set 2 contains values stored as 487x1 double, in the unit if Bq, it is stored each whole second
I want to plot them in the same figure to compare the two sets, but due to there being a order shift, the second set of data is much larger than the first set.
How can I find a calibration factor/coefficient that maybe I can use to make the second set in the same units as the first set (i.e make Bq to kBq/cc)?
I was thinking about a regression analysis, but I do not really know if the R I get from set 1 acutally is just to multiply with set 2 and it gives the right unit. I am really out on deep water and unsure of what to do.
I will post the three plots I've made so it will be easier to visualize the data

Accepted Answer

Veronica Taurino
Veronica Taurino on 2 Mar 2021
Edited: Veronica Taurino on 2 Mar 2021
You could just plot them in one figure with two axes:
  4 Comments
Amanda Eriksson
Amanda Eriksson on 4 Mar 2021
Yes, I am comparing two blood sampling devices (they detect the true coincidences that happens when radioactivity decays, within the drawn blood). But instrument 1 is calibrated so that we get the measurement in kBq/cc, while for instrument 2 it only give out in Bq, thus we need a calibrationfactor. Usually when performing this onto patients, we take the catheter and measures it in a well counter. But this measurement above is simply done with saline and a radiotracer FDG, so the catheter wasn't measured in a well counter.
And I thought that maybe in someway it would be possible to find a calibrationfactor between the two by comparing them, but maybe that isn't possible. Very unsure, but thank you!
Veronica Taurino
Veronica Taurino on 4 Mar 2021
Edited: Veronica Taurino on 4 Mar 2021
I get it better know. Maybe you already know it but try checking with the instrument producer, they should provide some calibration factors.

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!