logo
down
shadow

Why does R paste more decimals than have been rounded, but only sometimes?


Why does R paste more decimals than have been rounded, but only sometimes?

Content Index :

Why does R paste more decimals than have been rounded, but only sometimes?
Tag : r , By : Bo.
Date : November 28 2020, 04:01 AM

I think the issue was by ths following , There's rounding error, but in this case R is not handling it nicely.
Any representation of floating-point numbers in R is done as double, which means 53 bits of precision, approximately 16 digits. That's also for the 99.7, you can see where it breaks down:
print(99.7, digits=16) # works fine
print(99.7, digits=17) # Adds a 3 at the end on my platform
print(100-99.7, digits=14) # works fine
print(100-99.7, digits=15) # Allready rounding error at digits=15
paste(format(100 - y, digits=14), "is the inverse")

Comments
No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

Javascript: formatting a rounded number to N decimals


Tag : javascript , By : dnyaneshwar
Date : March 29 2020, 07:55 AM
I hope this helps you . That's not a rounding ploblem, that is a display problem. A number doesn't contain information about significant digits; the value 2 is the same as 2.0000000000000. It's when you turn the rounded value into a string that you have make it display a certain number of digits.
You could just add zeroes after the number, something like:
var s = number.toString();
if (s.indexOf('.') == -1) s += '.';
while (s.length < s.indexOf('.') + 4) s += '0';

How to stop decimals being rounded up or down using php


Tag : php , By : Bado
Date : March 29 2020, 07:55 AM
help you fix your problem It's working well for me, try this:
echo floor(67.9699 * 100) / 100;

how to print double using rounded number of decimals


Tag : chash , By : Blight
Date : March 29 2020, 07:55 AM
I hope this helps you . It's important to understand that float and double don't retain trailing zeroes. You have two options:
Specify the format to include the number of decimal places you're interested in Use decimal, which does retain trailing zeroes

Why in c# 2.135 is always rounded (using 2 decimals) to 2.13


Tag : chash , By : Grant
Date : March 29 2020, 07:55 AM
this one helps. To answer the question from your title:
2.135 is not always rounded(using 2 decimals) to 2.13, this just happens in your case because you are using a binary floating point data type. (As leppie pointed out, 2.135 cannot be represented accurately as a double, please note also that Microsoft seems to disinguish between decimal and floating point types, even though decimal also fits the definition)
decimal val1 = 2.135m;
decimal val2 = 3.135m;

Console.WriteLine("decimal val1({0}) rounded = {1}", val1, Math.Round(val1, 2));
Console.WriteLine("decimal val2({0}) rounded = {1}", val2, Math.Round(val2, 2));

double dval1 = 2.135;
double dval2 = 3.135;

Console.WriteLine("double val1({0}) rounded = {1}", dval1, Math.Round(dval1, 2));
Console.WriteLine("double val2({0}) rounded = {1}", dval2, Math.Round(dval2, 2));

How can I prevent decimals being rounded when using DecimalFormat?


Tag : java , By : k19k
Date : March 29 2020, 07:55 AM
Related Posts Related QUESTIONS :
  • ggplot2 different label for the first break
  • TSP in R, with given distances
  • How to find the given value from the range of values?
  • Solution on R group by issue _ multiple combination
  • Transform multiple columns with a function that uses different arguments per column
  • How can I parse a string with the format "1/16/2019 1:24:51" into a POSIXct or other date variable?
  • How to plot a box plot in R for outlier detection for a huge number of rows?
  • How to change column name according to another dataframe in R?
  • `sjPlot::tab_df()`--how to set the number of decimal places?
  • time average for specific time range in r
  • joining dataframes by closest time and another key in r
  • How to create nested for loop for a certain range
  • New category based on sequence of date ranges
  • how to extract formula from coxph model summary in R?
  • add row based on variable condition in R
  • Generating the sequence 111122222333334
  • Unable to use has_goog_key() in R
  • how to multiply each row with a scaler in corresponding column?
  • R is not recognizing levels of a factor as the same. Is there a way to do this?
  • Calculating mean of replicate experiment result values in a column based on multiple columns using R
  • Best method to extract the first instance of a string between specified keywords using data.table
  • ignore optional combination of alphanumeric characters in str_extract
  • Why tracemem shows two copies when modification occurs inside function body?
  • Can't use mppm on multitype point patterns
  • How to move selected matrix rows to top of matrix based on a selection vector of row names
  • Combining expressions with a common operator
  • Passing string through multiple filters for matching
  • Convert two columns in R to rows of unique occurrence
  • How to create a dataframe using a function based on user-input?
  • How to access the visited vertices in a given shortest path using R igraph
  • Differences in Unicode character output with print()
  • Extracting Function or Objects from a String and then Piping Them with Magrittr/Dplyr
  • renderUI not evaluated until it is rendered
  • Find the maximum absolute value by row in an R data frame
  • Extracting data from irregular lists using purrr:map()
  • transforming data based on range of column in r
  • Identify and subset rows with some similar information
  • converting character from mongolite to timestamp in R
  • Create list from two vectors with every combo of each
  • Error in running a spread because of unique 'key combinations'; combining rows of data
  • visualize numerical strings as a matrixed heatmap
  • how to make a blocked matrix?
  • How to summarize with two functions using with dplyr
  • Dataframe is no longer the same after being saved to Excel and read back in
  • Create duplicate rows using based on availability of data
  • Keep empty groups when grouping with data.table in R
  • Grouping of Event Time Data based on multiple, iterative conditions
  • Formatting Numbers in Flextable for Specific Columns
  • How to store results from for-loop into a dataframe
  • How to select the values in my dataframe which has logical operator "<" (less than), divide them by two, an
  • Rowwise extract data between two strings
  • Convert a string separate by . and +
  • stacking function for values in R
  • dplyr coerces characters to factors
  • How do I use spread and group_by on a single row dataset
  • Replacing values in one matrix with values from another
  • Aggregate data and exclude duplicates in one column
  • Perform an R data.table binary search with OR select
  • How can I include a function in the Standard Deviation parameter of pnorm
  • How to get a tidy excel output of P values from R
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com