Questions tagged [rounding]
The rounding tag has no usage guidance.
18
questions
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32 views
Systems using Round cannot be solved with methods available [closed]
I have a simple system for which I would like a solution:
$\text{round}(a \cdot x^2 + b \cdot x + c) = \text{round}(x^2)$
Even simpler (for purposes of debugging), consider this special case:
$\...
0
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0answers
40 views
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 ...
2
votes
1answer
147 views
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 *)
...
7
votes
3answers
406 views
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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2
votes
1answer
89 views
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 ...
3
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3answers
238 views
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0answers
38 views
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 ...
1
vote
1answer
653 views
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:
...
1
vote
2answers
80 views
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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2
votes
0answers
65 views
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:
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1
vote
1answer
222 views
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 ...
2
votes
1answer
192 views
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 ...
4
votes
3answers
427 views
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 ...
1
vote
3answers
132 views
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 ...
0
votes
1answer
203 views
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:
...
6
votes
2answers
803 views
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 ...
6
votes
1answer
154 views
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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3
votes
3answers
2k views
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 ...
