Questions tagged [rounding]
The rounding tag has no usage guidance.
26 questions
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How to transfer a numerical value in Mathematica into a symbolic fraction with sufficiently large precision?
Suppose I have a number $0.26630939883535015$ and want to transfer it into a symbolic fraction by truncating it first. The way I do it is first Round it and then <...
- 511
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Rounding the solution of NSolve
How do I round x and y solved in the equation to only integer solutions?
I get an error no matter where I put ...
- 446
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127
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Am I losing precision in manually entered equations?
I am using the following code to calculate the two solutions of a quadratic equation in the variable t.
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3
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How can I get these decimals formatted properly?
It's nothing serious, but I was just wondering. I have a large number of floating point numbers which I write to a file. Mathematica writes each number with 17 decimal positions, which is way more ...
- 6,998
2
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Rounding Real number
I have real numbers in array, I want to round (or truncate) these numbers to 2-digit after decimal point, then I want to write values to Excel File
For example if I have
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1
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1
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Rounding Issue with a number containing "`"
I would like to round a number saved in a weird format (I have no idea what the "`" means, could someone explain?) to 3 digits:
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- 236k
4
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1
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136
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Round to certain values
For a program I write I need some optimal values. I calculated them using Mathematica and I get something like this:
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- 361
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171
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Rounding corners of lines
I can easily produce rectangles with rounder corners using RoundingRadius. However, I am unable to do for an open curve
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- 625
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What is the limit of digits to show in the conversion of an exact number to an Arbitrary Precision Number?
By executing something like N[π, c] what is the maximum positive integer value c can have until the output is compromised by ...
- 41
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Rounding to the nearest decimal and pasting such output into an Input cell
This question is very closely related to two earlier ones:
Rounding to the nearest decimal
and
How do you round numbers so that it affects computation?
but confronts an additional issue not ...
- 132k
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Is NumberForm double rounding numbers?
A number like 0.644696875 is represented internally as 0.6446968749999...:
N[FromDigits[RealDigits[0.644696875, 2], 2], $MachinePrecision]
(* 0.6446968749999999 *)
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8
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3
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859
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Count number of occurences of particular numbers in list
I have a list of numbers which I have rounded and now all numbers are divisible by 5.
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- 71.2k
2
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Efficient Round edition with different rounding direction
As pointed out in this post, Mathematica has a special version of Round that
Round rounds numbers of the form x.5 toward the nearest even integer.
A comment by ...
- 17.1k
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304
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0
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Return the precision of the first non zero digit in a number for measurement error representation function
I'd like to return the precision of the first non zero digit in a number. The motivation is so that I can quickly construct my error notation which is the bracketed notation, e.g.
$x = 1.234$ with ...
- 20.2k
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Rounding a number to decimal places and keeping a trailing zero
It's often useful for me to round numbers to some decimal place for printing on a graph or figure. I usually do this by:
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- 8,448
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2
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How can I Influence the number of digits when printing a polynomial expression or when I want to make it a String?
I have an expession (it is the result of Fit) but I want to print or display an abbreviated form with all numbers in it rounded to say 6 decimal digits.
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- 132k
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Why does Mathematica round numbers in this way where the fractional part is 0.5? [duplicate]
I was trying to comment on sequence https://oeis.org/A047229 in the OEIS, when one of the editors pointed out that the rounding is done wrong in this Mathematica one-liner:
...
CommunityBot
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1
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Chop not working [closed]
I am running a function that has a large output in matrix format with small, complex parts added to the numbers- basically a rounding error. I am trying to use Chop to obtain use-able results, but ...
- 14.5k
3
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Create an accumulator array from a function
I am making some images for a project about the hough transform line detection, I am showing the slope-intercept form , the normal form and their accumulator arrays to show the peaks. I am kind of new ...
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Opposite Collatz Conjecture
I'm trying to explore what would happen if you change the collatz conjecture to flip the equations for odds and evens. So if you have an even number you multiply by 3, add 1, and divide by 2. If you ...
- 64.8k
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3
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Keep leading/trailing zeroes (like Defer except with numbers) in a given number
I'm trying to write a function that counts the number of significant figures a given number has so I can ensure my calculations are rounded correctly; however, I am having a lot of trouble preventing ...
CommunityBot
- 1
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Why doesn't the Round function work on decimals and how to fix it or work around it [duplicate]
I'm trying to specify yaxis tick labels from 0 to 1.0 in steps of 0.1.
This is what I get:
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- 108k
6
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Round vs. Floor vs. Ceiling for non-integers non-orders-of-magnitude
I understand that Round give the nearest even integer for cases where the number is between two integers, i.e. Round[2.5] = 2 ...
CommunityBot
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Is the divergence between Round and setting an explicit precision intentional or a bug?
Introductory remark: I take it (from Mathematica's online documentation), that Precision is effectively the number of significant digits, as seen by the system.
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