Format double value in scientific notation
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
scientific-notation
Convert from scientific notation string to float in C#
Double.Parse(“1.234567E-06”, System.Globalization.NumberStyles.Float);
How can I convert numbers into scientific notation?
You can do something like this: a = 200 a.toExponential(); //output 2e+2 fiddle: http://jsfiddle.net/Q8avJ/9/
Scientific notation colorbar
You could use colorbar‘s format parameter: import matplotlib.pyplot as plt import numpy as np import matplotlib.ticker as ticker img = np.random.randn(300,300) myplot = plt.imshow(img) def fmt(x, pos): a, b = ‘{:.2e}’.format(x).split(‘e’) b = int(b) return r’${} \times 10^{{{}}}$’.format(a, b) plt.colorbar(myplot, format=ticker.FuncFormatter(fmt)) plt.show()
Scientific notation colorbar in matplotlib
You could use colorbar‘s format parameter: import matplotlib.pyplot as plt import numpy as np import matplotlib.ticker as ticker img = np.random.randn(300,300) myplot = plt.imshow(img) def fmt(x, pos): a, b = ‘{:.2e}’.format(x).split(‘e’) b = int(b) return r’${} \times 10^{{{}}}$’.format(a, b) plt.colorbar(myplot, format=ticker.FuncFormatter(fmt)) plt.show()
How to express numbers in scientific notation in java? [duplicate]
Section 3.10.2 of the JLS talks about floating-point literals in Java. In short, provide the decimal part as if it were scientific notation, but instead of x 10^23 you would write e23: 3.30e23 To write one with a negative exponent, you can do that easily also for 6.67 x 10^(-11): 6.67e−11
Converting number in scientific notation to int
Behind the scenes a scientific number notation is always represented as a float internally. The reason is the varying number range as an integer only maps to a fixed value range, let’s say 2^32 values. The scientific representation is similar to the floating representation with significant and exponent. Further details you can lookup in https://en.wikipedia.org/wiki/Floating_point. … Read more
Prevent scientific notation in ostream when using
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 … Read more
Parsing scientific notation sensibly?
Google on “scientific notation regexp” shows a number of matches, including this one (don’t use it!!!!) which uses *** warning: questionable *** /[-+]?[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?/ which includes cases such as -.5e7 and +00000e33 (both of which you may not want to allow). Instead, I would highly recommend you use the syntax on Doug Crockford’s JSON website which … Read more