# Questions tagged [units]

Questions about using, converting, or interpreting units of measurement in Mathematica.

58 questions with no upvoted or accepted answers
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### Differences of Quantities gives different result in different Mathematica version

In Mathematica 12.2 Differences[{Quantity[1, "mm"], Quantity[1, "mm"]}] gives ...
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345 views

### Spectral Radiance unit Flicks is not correct

Bug introduced in version 10.3 or earlier and fixed in 11.1. I was pleasantly surprised that Mathematica (10.3, 10.4, 10.4.1, 11.0 and 11.0.1) had the unit $\text{flick}$ until I spent several hours ...
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468 views

### Incomplete implementation of units?

I've been playing around with the new units capability in MMA9 and I'm becoming a bit frustrated with what I perceive as an incomplete implementation of this capability and I'm wondering if there are ...
• 5,626
93 views

### Join on QuantityArray

I need to merge two QuantityArray objects of mixed type. My first attempt looks something like: ...
• 47k
149 views

### Calculations with "Quantities" Run Slow. What am I doing wrong?

This code plots a 1000 point black body radiation curve in 0.7 seconds. ...
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44 views

### Any progress on Plots of Quantities?

Plots of quantities still don't seem to work. I've implemented the one suggestion people have: use Evaluate, but now the values of my plots are just completely off ...
76 views

### Plotting InterpolationFunction over Quantities

What's the proper syntax to plot Interpolation functions defined over Quantities? points = {{0, 0}, {1, 1}, {2, 3}, {3, 4}, {4, 3}, {5, 0}}; Change domain to ...
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83 views

### Problem with specifying quantity value in FormulaData

I wanted to use the formulas for KineticEnergy and KineticEnergyRelativistic with specific quantity vaules. The later formula ...
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462 views

1 vote
39 views

### Using Infinity with AutomaticUnits

I am using the AutomaticUnits package in Mathematica 10, and I am writing some unit checking functions. However, I run into a problem when I have an Infinity, since ...
• 198
1 vote
122 views

### Using Quantity[] units causes errors in my calculation

I have an interpolation function in which I wish to use actual units. If I perform the calculation normally, it works fine and returns a proper FittedModel. To illustrate my problem, consider the ...
1 vote