scientific-notation

How can I print a huge number in Lua without using scientific notation?

由 不打扰是莪最后的温柔 提交于 2019-11-27 06:44:19
问题 I'm dealing with timestamps in Lua showing the number of microseconds since the Epoch (e.g. "1247687475123456"). I would really like to be able to print that number in all its terrible glory, but Lua insists on printing it in scientific notation. I've scoured the available documentation about printing a formatted string, but the only available commands are "Print in scientific notation (%e/%E)" and "Automatically print in scientific notation if the number is very long (%g)". No options seem

Python scientific notation using D instead of E

由 回眸只為那壹抹淺笑 提交于 2019-11-27 05:55:50
问题 Some results file produced by Fortran programs report double precision numbers (in scientific notation) using the letter D instead of E , for instance: 1.2345D+02 # instead of 1.2345E+02 I need to process huge amounts of this data using Python, and I just realized it cannot read the numbers in the D notation, for instance: >>> A = 1.0D+01 File "<stdin>", line 1 A = 1.0D+01 ^ SyntaxError: invalid syntax Can I change my locale and let Python know that D means E ? I really would not want to make

Convert from scientific notation string to float in C#

由 落花浮王杯 提交于 2019-11-27 01:57:18
What's the proper way to convert from a scientific notation string such as "1.234567E-06" to a floating point variable using C#? Double.Parse("1.234567E-06", System.Globalization.NumberStyles.Float); Also consider using Double.TryParse("1.234567E-06", System.Globalization.NumberStyles.Float, out MyFloat); This will ensure that MyFloat is set to value 0 if, for whatever reason, the conversion could not be performed. Or you could wrap the Double.Parse() example in a Try..Catch block and set MyFloat to a value of your choosing when an exception is detected. 来源： https://stackoverflow.com/questions

Scientific notation colorbar in matplotlib

由 柔情痞子 提交于 2019-11-27 00:11:24
问题 I am trying to put a colorbar to my image using matplotlib. The issue comes when I try to force the ticklabels to be written in scientific notation. How can I force the scientific notation (ie, 1x10^0, 2x10^0, ..., 1x10^2, and so on) in the ticks of the color bar? Example, let's create and plot and image with its color bar: import matplotlib as plot import numpy as np img = np.random.randn(300,300) myplot = plt.imshow(img) plt.colorbar(myplot) plt.show() When I do this, I get the following

Python - fixed exponent in scientific notation?

由 南笙酒味 提交于 2019-11-26 23:02:47
问题 Consider the following Python snippet: for ix in [0.02, 0.2, 2, 20, 200, 2000]: iss=str(ix) + "e9" isf=float(iss) print(iss + "\t=> " + ("%04.03e" % isf ) + " (" + str(isf) + ")") It generates the following output: 0.02e9 => 2.000e+07 (20000000.0) 0.2e9 => 2.000e+08 (200000000.0) 2e9 => 2.000e+09 (2000000000.0) 20e9 => 2.000e+10 (20000000000.0) 200e9 => 2.000e+11 (2e+11) 2000e9 => 2.000e+12 (2e+12) My question is - is it possible to "go back" somehow? That is: 2.000e+07 => 0.02e9 2.000e+08 =>

Avoid Scientific notation in cut function in R

由 倾然丶 夕夏残阳落幕 提交于 2019-11-26 16:54:24
问题 How to avoid scientific notation present in the Intervals created by the cut function. a<-seq(10000,50000, by=500 ) cut(a, breaks = seq(0,max(a)+300, by = 300)) I have tried the below but it doesn't help. options("scipen"=100, "digits"=4) 回答1: As suggested by Pascal, Try with adding the argument dig.lab = 5 to cut function. 来源： https://stackoverflow.com/questions/29004620/avoid-scientific-notation-in-cut-function-in-r

How can I convert numbers into scientific notation?

由 丶灬走出姿态 提交于 2019-11-26 14:41:05
问题 I want to make a function that takes an entered value and converts it to scientific notation (N x 10^a) I've tried many different things, but I can't seem to get it right. Example: I enter 200. The converter converts it to 2 x 10^2 回答1: You can do something like this: a = 200 a.toExponential(); //output 2e+2 fiddle: http://jsfiddle.net/Q8avJ/9/ 回答2: At some point I wanted to use the coefficient and the exponent as numbers. If you want to do that, you can use toExponential function, split the

Prevent scientific notation in ostream when using << with double

由 柔情痞子 提交于 2019-11-26 13:46:20
I need to prevent my double to print in scientific notation in my file, when I do this outfile << X; davecoulter To set formatting of floating variables you can use a combination of setprecision(n) , showpoint and fixed . In order to use parameterized stream manipulators like setprecision(n) you will have to include the iomanip library: #include <iomanip> setprecision(n) : will constrain the floating-output to n places, and once you set it, it is set until you explicitly unset it for the remainder of the stream output. fixed : will enforce that all floating-point numbers are output the same

Format double value in scientific notation

由 大憨熊 提交于 2019-11-26 11:22:35
I have a double number like 223.45654543434 and I need to show it like 0.223x10e+2 . How can I do this in Java? System.out.println(String.format("%6.3e",223.45654543434)); results in 2.235e+02 which is the closest I get. more info : http://java.sun.com/j2se/1.5.0/docs/api/java/util/Formatter.html#syntax Greg Olmstead From Display numbers in scientific notation . ( Copy/pasting because the page seems to be having issues ) You can display numbers in scientific notation using java.text package. Specifically DecimalFormat class in java.text package can be used for this aim. The following example

Format double value in scientific notation

由 ≯℡__Kan透↙ 提交于 2019-11-26 02:22:15
问题 I have a double number like 223.45654543434 and I need to show it like 0.223x10e+2 . How can I do this in Java? 回答1: System.out.println(String.format("%6.3e",223.45654543434)); results in 2.235e+02 which is the closest I get. more info : http://java.sun.com/j2se/1.5.0/docs/api/java/util/Formatter.html#syntax 回答2: From Display numbers in scientific notation. ( Copy/pasting because the page seems to be having issues ) You can display numbers in scientific notation using java.text package.
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