# Questions tagged [conversion]

Questions on changing Mathematica expressions of one type or format to another, for example date formats, Boxes and other typesetting representations, or different units of measurements.

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### DateObject granularity conversion

Is there a way to convert the DateObject whose FullForm is: ...
123 views

### Convert String to Integer from a huge string database in a very fast way?

I have a huge string database with the form such as {{position},{1,2,3,4,5,..}}, and I want to convert such database to Interger data in a very quick way. In the following example, I created a ...
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### Efficient conversion of a ByteArray object into a hexadecimal string

What is the best way to convert ByteArray objects into hexadecimal string representation? Although the following works, I find it questionably awkward (and likely ...
67 views

### How do I treat polynomials as vectors?

From time to time I find myself in the following situation. I have generated a list of polynomials from some ring $R=\mathbb R[x_1,\ldots,x_n]$ and now I wish to view these polynomials as vectors in ...
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### How to convert {x -> 4} to simply 4? [duplicate]

I am using the Solve function to obtain two solutions for a quadratic, then I want to use those two solutions as input for something else but I can't because they are in the form of (x->number} ...
51 views

### How to encode the character into UTF-8?

As we know the café is caf\xc3\xa9 after encode by UTF8: >>> 'café'.encode('utf8') ...
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### Programmatically get InputText of box structure without spaces

I am looking for a way to get something similar to the "Input Text" form of an arbitrary box structure, but without the extra whitespaces. Before I explain the requirements in a bit more detail, let'...
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### A way to calculate colour from wavelength?

I'm trying to create a script taking my experimental values of measured radiance and turn it into xyz and rgb colour values. I import table with colour matching functions from here -http://cvrl.ucl.ac....
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### Specify set of base units to use in UnitConvert

I am trying to convert arbitrary units to CGS. I know this can get a bit tricky with ESU, but for this question that does not need to be addressed. What I would like to do is to give a quantity-to-...
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### Is there any way to turn Labeled[…] into graphics primitives?

I have asked a similar question before. In that question I pointed out that the following code does not work: ...
397 views

### Converting built-in Mathematica symbol to C [closed]

I am trying to convert my Mathematica code to C since it can sometimes takes the Mathematica code quite a while to execute since the arrival times lists are hundreds of thousands of counts long, and ...
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### How to extract the code from a cdf file? [duplicate]

I have several CDFs, and these bring interactive drawings with functions, how can I extract the code that generates them? I have tried to follow some previous answers but it does not work for me, it ...
130 views

### Convert ASCII Characters to Mathematica Input Form

I have the following pure ASCII character list: ...
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### Convert Part of Subscript Files to Math Form

I have french subscript file here: https://uploadfiles.io/iehon If you download it an open it with Word, you can see that the math sections are but between $<i>$ and <\i>: To import the ...
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### Convert RotationMatrix to RotationTransform

Is it possible to convert RotationMatrix to RotationTransform ? I guess it should exist a function to do this Thank you for ...
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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, ...
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### How to convert DateList format to standard SQL format?

I have a date in standard SQL format YYYY-MM-DD HH:MM:SS.xx, where the xx are hundredths of seconds: x = 2016-05-30 11:58:46.84 I have a file with 200,000+ ...
265 views

### How to convert a list of digits to a string in Mathematica

I want to convert a list of digits to a string, for example from {1,2,3,4,5}, I want to get the string 12345. The following will work as long as the list does not ...
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### Points in CIE Lab color space

The following points are Lab values (CIELAB color space) points={{46.76, 34.51, 17.08}, {43.51, 34.83, 15.7}, {45.49, 32.92, 15.24}} what I would like to do is a) ...
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### TeXForm of symbols

For reasons unknown, TeXForm seems to produce different results when acting on symbols that are one character long versus longer characters: ...
182 views

### How can I plot the price of Bitcoin since last week?

What is the best way to plot the price AND volume of Bitcoin (or any other currency) in USD for the past week/month/year? Is it a good idea to use CurrencyConvert? ...
123 views

### Multiplying quantities by scalars in Mathematica 11.3

I'm no longer able to multiply scalars by quantities in Mathematica 11.3. In previous versions the code 3*Quantity[1, "mm"] evaluated to ...
220 views

### Convert Mathematica Code to R Code

I would like to convert Mathematica code to R code. For example, 4/(-1 + δ) + (-1 + δ) Subscript[P, R] The above is a copy version from Matematica. But I would ...
131 views

### Extraction of array from NDSolve output

I have got a system of differential equations. The system has $4$ variables. I am trying to plot trajectory of a particle outside a Kerr Black Hole. I have used Mathematica to calculate all the $4$ ...
225 views

### Schrödinger's MatrixForm: feature or bug?

Recently I noticed a peculiar behavior of MatrixForm that I failed to find a way to explain. Consider the following example: ...
129 views

### The algorithm behind InputForm for machine numbers

There are several questions on this site about implementing fast CSV/TSV export for machine numbers without loss of precision. Recently I discovered that Export ...
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### Convert a numerical expression to words

I would like to convert algebraic sums of the form 8+1-3 into words, obtaining "eight plus one minus three". I have tried using ...
190 views

### Safe alternatives to ToExpression

Background Conversion from string/boxes to expression is quite common. Very often the goal would be a simple switch from "1" to ...
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### How to convert cdf to stl format

I have the CDF version of the file that i need to 3D print, and because it wont let me convert to an STL format the normal way, how can i convert it.Is there a format i can convert it to, then open it ...
225 views

### How to convert dayname to number?

When I input DayName[{2012,12,24}] I get Monday as output. What is the most effective way to convert Monday into 1, Tuesday into ...
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### Is there a function to convert an English description to an expression?

I know I can write: SpokenString[a + b^2] And then obtain as output: "a plus b squared" What about the opposite, something ...
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### Unable to convert degree to number in LatitudeLongitude and “City” Entity

I am trying to convert degree to number for some mathematical transformation. Taking London as an example, the following codes can convert the degree into a number without any problems: Codes that ...
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### Using Rationalize to find the exact rational form [duplicate]

When I run Rationalize[2.98688387095, 0] I get $\frac{117300079}{39271724}$ However, when I run N[117300079/39271724, 50] ...
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### Converting Matlab code to Mathematica [closed]

I have following Matlab code: ...
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### ToExpression and RowBox — orderings

With: ToExpression[RowBox[{"c", ToBoxes[Plot[Sin[x], {x, -2, 2}]], "a"}]] I get the three elements of the array, but with "a" and then "c" at the beginning. I ...
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### Mathematica to Matlab

my question is a duplicate of : Is it possible to export the equations from Mathematica to MATLAB? I did some symbolic calculations in Mathematica and want to transfer the result to Matlab. The ...
627 views

### How to Convert Mathematica Notebooks to PDF's?

My book is done. I'm left with twenty seven (27) Mathematica Notebooks (.nb's) How do I convert these notebooks to the pdf format? How do I combine all twenty seven (27) pdfs into a single pdf? Thanks ...
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### Subtracting Missing[] the old way

In previous versions of Mathematica Missing[]- Missing[] would output Missing[]- Missing[]. In the current version is outputs 0. Is there a way to get Mathematica to revert back to the old output? ...
323 views

### How to transform general Ellipsoid into rotated axis-oriented one?

Recently, I discovered a long-standing bug in the rendering of Disk and Circle primitives after applying ...