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Is there any java api for calculating interquartile range? I was wondering apache commons math library contains all the stats function like mean, median, mode but i could not find any thing for IQR.
I'm not sure, but maybe you can use getPercentile from DescriptiveStatistics class of Apache Commons Math, like in the following code sample.
double[] data = // obtain data here
DescriptiveStatistics da = new DescriptiveStatistics(data);
double iqr = da.getPercentile(75) - da.getPercentile(25);
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Closed 8 years ago.
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I have a problem to testing my fuzzy logic on Java programming either right or wrong.
Do you have any simple source code to test it.
May you share to me, please.
Kindly need your help.
Thank you so much.
Best Regards,
Deni Y.
The codez:
public class FuzzyLogicTester
{
public static void main(String[] args)
{
int a = 1 + 1; // \u000a\u0061\u002b\u002b;
System.out.println(a);
}
}
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I have 2 arrays containing time and voltage. I would like to convert time domain to frequency domain in Java. I would like to use FFT. If there is any open source library I could use, please point me to it. I have done a research and found few algorithms but they are asking for real part and imaginary part. If anyone got idea regarding that, please let me know how I could use that in my context.
Code I have found so far
Here is one library:
http://www.fftw.org/download.html
You can also use R with Java. See this link:
Java-R integration?
If you are not familiar with R check their home page r-project dot org (I can't post more links)
While I haven't checked the implementation you link to, you should be able to use that one by suppling 0s for the imaginary part. In that case you are going "forward", i.e. set DIRECT to true transforming from time-domain to the frequency domain. The function will return an array containing real parts of the frequency in even numbered seats, and the imaginary part in odd numbered.
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Is there any simple library in java which can parse a string as input and produce result after evaluating the input string.
Such as- I will give a String like 5+5*(4/2)-7+1
and any of the library method will return me the output: 9.
Java provides a built-in JavaScript syntax processing:
javax.script.ScriptEngineManager mgr = new javax.script.ScriptEngineManager();
javax.script.ScriptEngine engine = mgr.getEngineByName("JavaScript");
String res = "5+5*(4/2)-7+1";
System.out.println(engine.eval(res));
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java.awt.Color has a couple of defined Colors - for example, Color.RED (or Color.red) is a public static value that returns Color(255, 0, 0). But there are only a limited set of colors defined - 13 by my count.
Are there any Java libraries that have the HTML Color Chart colors defined, so I can say something like ColorLibrary.AQUAMARINE and get back #60CC93? Or, even better, are there libraries that map the name to the color, so I can say Color color = ColorMap.get("aquamarine");?
There aren't many libraries which have compiled a map of colour names to rgb/hex values, however there are a few different libraries which provide functions to get colours which are predefined by java.
See:
http://www.java2s.com/Tutorial/Java/0261__2D-Graphics/Convertsagivenstringintoacolor.htm
http://www.martiansoftware.com/jsap/doc/javadoc/com/martiansoftware/jsap/stringparsers/ColorStringParser.html
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I'm looking for an api/method/framework where I can compare strings. One is a string stored on the server whereas the other is a string given by user input.
For example:
Stored String : "Login"
User input : "login" "log in" "lOG IN" or any such permutation.
I'm using java in spring mvc (making a webapp). the server is getting a string from the user and then looks for a string similar to the given string and returns the found records.
Any help would be appreciated. Thanks
Unless your data size is small (< a few MB), you probably want something like Apache Lucene, which can be used to index and search large document sets, and can do fuzzy searches using Levenshtein distance and other algorithms for similarity matches.