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

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1answer
147 views

NIntegrate with units: unable to determine the units of quanitites that appear in the input

I want to integrate Planck's law of radiation in a certain wavelength intervall with units. I define some constants: ...
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1answer
130 views

Caching data in Mathematica package

Consider the following: m=Quantity[1,"meter"] If I run the package, it will return 1m But when I load the package, the ...
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1answer
106 views

Extract function parameters from “unevaluated” FormBox

I want to get the abbreviation for a Unit from its full name eg. "Newtons" => "N". Using ...
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1answer
61 views

UnitConvert of a Quantity whose value is a function of a Quantity

I am having trouble with UnitConvert when the QuantityMagnitude contains an embedded ...
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1answer
101 views

Unit System documentation

Is there any documentation on what consists of the unit system "SIBase","Imperial", "SI" and ...
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1answer
101 views

Grouping units more sanely

Would it be possible to get Mathematica to group units more sanely. For example the calculation: ...
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1answer
93 views

Differential Equations and Unit Notation

What do I get the Syntax::sntxi: Incomplete expression; more input is needed . error when I try to use the math palette for derivatives? What does the dot in 10. Farad Micro Volt mean? ...
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0answers
61 views

Convert large KML coordinate datasets to UTM [closed]

I was wondering if there are ways to convert massive amounts of KML coordinates into UTM coordinates using Mathematica. Other programs would also be acceptable. Thanks. I have the KML file from ...
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0answers
28 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 ...
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0answers
55 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 ...
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0answers
87 views

Geodesy without units?

Suppose I'm interested in the latitude of Los Angeles and I do the following: ...
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0answers
118 views

Insert a Quantity Unit literal in TraditionalForm

Is there a keyboard shortcut for creating something like the result of this: Quantity["Kilograms" * ("Meters")^2 / ("Seconds")^2] After copying the result to a ...
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0answers
125 views

How can I say that all quantities need to be positive (and real)? [duplicate]

Can you say at the beginning of a script in Mathematica that you want all the quantities to be positive (and real)? So that in all calculations, only the real values of these quantities will be ...
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2answers
153 views

Converting the units of an equation or expression (how to become 3 times heavier…)

(THIS QUESTION HAD A MAJOR SIMPLIFICATION EDIT) Lets suppose I want to convert the falling body equation, from one set of units to another. I start with: ...
0
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1answer
111 views

AstronomicalData not including units?

I like using mathematica to do my physics homework, and AstronomicalData is useful for that, but it doesn't seem to work properly with units. [the question is, at ...
0
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1answer
66 views

Electromagnetism units conversion in Mathematica 10 (possible bug)

Is this a bug in Mathematica 10? Why can't I convert Amps/m to Gauss? ...
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1answer
49 views

Enter meter unit with Histogram [closed]

I'm looking at the documentation for Histogram and I am trying the example: ...
0
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1answer
84 views

Working with symbolic values in Quantities [duplicate]

I have the following expression: x Quantity[y, ("Milliwatts"*"Seconds"^2)/"Joules"] If I try to convert this to the SI unit, I would expect to get ...
0
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1answer
360 views

Unit conversion is not simplifying units

I'm running into what looks like an error. ...
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0answers
27 views

manipulators with both an initial value and with physical units [closed]

I'm trying to make a program that has several parameters that I can vary with manipulators and then an answer that varies according to these parameters. I have added physical quantities, such as ...
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0answers
19 views

Evaluating UnitConvert inside LogPlot

I imported several Physical Quantities with their units and doing single calculations with them works fine and return the right unit, which I can change by UnitConvert[]... For the LogPlot I made a ...
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0answers
30 views

A complete list of quantities in Mathematica 9/10? [duplicate]

Often times when I'm traveling I don't have internet access and cannot reliably use Wolfram Alpha for unit look-up. Additionally, Alpha can always choose to change how it interprets the units I enter, ...
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0answers
35 views

QuantityArray display and UnitConvert

Bug apparently soved in Mathematica v10.3 In the reference: But if you try (Mathematica 10.1 Windows 8.1 x84): qa = QuantityArray[{2.3, 1.5, 9.0}, "Meters"]
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0answers
84 views

Plotting Earth's position with units

I'm trying to plot the Earth position with the Sun in the origin. I have two lists like this: ...
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0answers
145 views

Meaning of backtick in conjunction with units [duplicate]

In this fragment from an equation solution the backtick is used twice: ...
-1
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1answer
131 views

Make Quantity behave reasonable with Degrees Celsius

When using a Quantity with the unit of "DegreesCelsius" multiplication doesn't work as expected. If you have 10 degrees and ...