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Plotting a function with units gives two different results
With the following code block, I plot a function with units in it in two different ways. Both ways should do the same in my understanding of the documentation.cm = Quantity["Centimeters"];f[x_] :=...
View ArticleWhere to see all Mathematica units [duplicate]
Is there a tutorial page that have all Mathematica units? I sometimes have hard time figuring out the correct unit spelling when using quantities
View ArticleStreamPlot "Part is not a Graphics primitive or directive."
I am trying to use StreamPlot with units. Here is a minimal example to produce the error "Part is not a Graphics primitive or directive." :g[x_] := UnitSimplify[UnitConvert[x...
View ArticleHow to convert units from percent per year to real number with CountryData?...
I have CountryData coming in via e.g.Entity["Country", "Australia"][ EntityProperty["Country", "GDP", {"CurrencyUnit" -> "Constant2000USDollar", "TimeSeriesOperator" -> "AnnualGrowthRate"}...
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MixedUnit in Fractions
Is there a way to have a more common output format on MixedUnit?Quantity[317.2,MixedUnit[{"Minutes"/"Kilometers", "Seconds"/"Kilometers"}]]givesI would love to have some unit like...
View ArticleAccuracy and precision control for a simple calculation [closed]
Consider a very simple calculation: $231 \times (2.54) ^ 3$, which is the number of cubic cm in a US gallon.On my phone app calculator I got the exact answer, which is $3785.411784$.On Mathematica,...
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A problem about the integration of blackbody radiation law using FormulaData....
I am trying to integrate blackbody radiation law under 1500 Kelvin using the FormulaData command.The integration seems not to work properly after I designate the integration range. Mathematica does not...
View Articlemesh / region creation in unit meters or mm:
How can we know the unit of mesh or create a mesh in specified length units:such as, for example I have: bmesh = ToBoundaryMesh["Coordinates" -> {{0, 0}, {1, 0}, {1, 1}, {0, 1}, {1/6, 1/6}, {5/6,...
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Importing scientific data with uncertainties and units
I want to import scientific data from a CSV file. The data are length measurements in centimeters with uncertainties. I want to import the data with uncertainties and units into a vector - please see...
View ArticleWhy does different nondimensionalizations give different results? Although...
I have some problems with the non-dimensionalization of the Hamiltonian of motion in a Coulomb field.The Hamiltonian has a following form:$$H=-\frac{\hbar^2}{2\mu^*} \Delta_r-\frac{e^2}{\epsilon_0...
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Solve not working with cross product with units
I recently asked this question about using Solve with cross product.Solve not working when doing cross-productWhen I use the units in the definition of the variables, I am not able to get an answer.x =...
View ArticleIssue with unit conversion
I am getting an error converting energy unit Pa*m^3 (Pascal * Meters^3) to J (Joules).pi = Quantity[2.00*10^5, "Pascals"];Vi = Quantity[4.00*10^-6, ("Meters")^3];Vf = Quantity[8.00*10^-6,...
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Currency Interpretation for VND
Bug introduced in v12.2.0 or earlier, persisting through v13.2.1. Case number: 4973722As I was helping an OP with a question involving Vietnamese currency, I didn't realize at the time that the...
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Dealing with exponents that contain units?
Many of the equations I deal with involve powers of quantities which contain units. However, when the exponent contains units (e.g., E^Quantity[3, "Joules"]), Mathematica will not evaluate it "fully."...
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ToPolarCoordinates not working with units
I am trying to convert some quantities with units from rectangular to polar coordinates (to get the magnitude and angle). It seems that ToPolarCoordinates command does not calculate the angle when...
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How can the units of the "AtomCoordinates" in a Molecule be changed while...
Mathematica provides the Molecule function that can be visualized with MoleculePlot3D since version 12.0. Before, importing "XYZ" files would produce a Graphics3D object immediately. In this object,...
View Articlequantity of `Around` with "DimensionlessUnit"
Quantity[1, "DimensionlessUnit"]gives pure number1However,Quantity[Around[1, 0.1], "DimensionlessUnit"]still givesQuantity[Around[0.01`, 0.001`], "DimensionlessUnit"]instead of pure Around expression....
View ArticleUnit scaling: human readable Quantity units
Consider some calculation yielding Quantity[x,"B"] as output ("B" interpreted as byte).Is there a way to automatically convert this to the unit "GB" or "MB" or "TB" etc as the case may be. i.e. instead...
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How to prohibit automatic DegreesCelsius converting to Kelvins？
On this wiki page, temperature conversion is presented clearly. For example.It also warns that we should take care of temperature difference conversion which is a different conversion asIt is critical...
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Problem using UnitConvert
As we know in physics, power = torque * (angular velocity). But when I use UnitConvert to convert a quantity expressing power/(angular velocity) into newton-meters, UnitConvert fails.How can they be...
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Why is ExternalEvaluate running the command Quantity[471.04`, "Kilobytes"] on...
Raspberry Pi 4B with 32 bit Raspberry Pi OS Full:Linux raspberrypi 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr 3 17:24:16 BST 2023 aarch64 GNU/LinuxMathematica for Raspberry Pi 13.1The...
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Create by hand a formatted form of quantities
If I evaluate the following cell:Quantity["PlanckConstant"]I get as an output a very concise format of this quantity:Also, compare the legibility of these two cells:I want to find a way to create...
View ArticleCases syntax when expression sought is a Quantity
From the following list I wish to extract those cases for which the magnitude of a quantity is greater than zero for which I would like to then create a DateListPlot. list = {{DateObject[{2017, 01},...
View ArticleHow to find all InformationUnits by code method?
As I know, the "Megabytes" and "Gigabits" both are "InformationUnit":UnitDimensions["Megabytes"]UnitDimensions["Gigabits"]{{"InformationUnit", 1}}{{"InformationUnit", 1}}Is there any method to find all...
View ArticleHow to handle units of measurement?
I'm trying to understand how Mathematica handles units of measurement.That is I expect that a calculation should return a certain unit, but I don't succeed. Let's consider this example:(314.159 m...
View ArticleQuantityArray vs Array of Quantities
If memory and speed are not concerns, is there a reason to use QuantityArray instead of an array of quantities?
View ArticleHow to "factor out" units?
I have a huge expression that makes use of Mathematica's units support (Quantity[]) that I know evaluates to a dimensionless quantity. However, I'm unable to get Simplify[] nor UnitSimplify[] to...
View ArticleHow to have the units for energy show as kW h instead of h kW?
I observe the following in Wolfram Language:Quantity[ 1, "Kilowatt hours" ] (* or "Kilowatts" * "Hours" *)(* 1 h kW *)That looks rather unconventional and in Wolfram Alpha it is done as kW h, for...
View ArticleClear Guidelines for Symbolic Calculation With Units?
The following notebook performs a relatively simple physical calculation interacting position, velocity and acceleration of two charged point particles according to Weber electrodynamics.It is simple...
View ArticleIntegrate & Unit: unable to determine the units of quantities
In a Wolfram Notebook,I declare a function F1[x]=1/x where x is in "Meters"F1[X_] = With[{x=Quantity[X,"Meters"]},1/x]I integrate F1. Everything is Ok.NIntegrate[F1[r],{r,1,2}]But with the function...
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