Monday, July 28, 2014

Passing Fuzuli Expressions to Functions

Fuzuli Programming Language has many features borrowed from many popular languages such as C and Java as well as Lisp and Scheme.

It is known that a function pointer can be passed to a function in C and C++, whereas, we must declare the structure of a function using interfaces for doing same job in Java.

In Fuzuli, a Fuzuli source code can be directly passed to a function. This feature allows us to create generic functions easly. Let's show it using an example.

The code below creates four expressions that sum, subtract, product and divide two numbers, respectively.

(let expr1 (expression (+ a b)))
(let expr2 (expression (- a b)))
(let expr3 (expression (* a b)))
(let expr4 (expression (/ a b)))

The expression directive defines a runnable code using the directive eval as we will see later. Let's define a generic function that changes its behaviour respect to a expression parameter:

(function generic_function (params e x y)
   (let a x)
   (let b y)
   (return (eval e))

The function generic_function takes three parameters. The first one defines the real action. x and y are parameters that will be passed to expression later. Let's call this generic function using previously defined expressions:

(let enter "\n")
(let x1 15)(let x2 5)
(print "x1=" x1 ", x2=" x2 enter)
(print "+ : " (generic_function expr1 x1 x2) enter)
(print "- : " (generic_function expr2 x1 x2) enter)
(print "* : " (generic_function expr3 x1 x2) enter)
(print "/ : " (generic_function expr4 x1 x2) enter)

In first line we define the enter variable for printing output with line feed. In second line, we set x1 to 15 and x2 to 5. In third line, we are reporting the values of these variables.

The whole story lies at last four lines. In line four, we are calling the function generic_function using the predefined summation expression. In the next line, the same function is called using a different expression which calculates x1 - x2 . As it is clear to see that, last two lines calls the same generic function using two different expressions for getting the product and division of two numbers, respectively.

The output is :

x1=15.0, x2=5.0
+ : 20.0       
- : 10.0       
* : 75.0       
/ : 3.0        

Happy readings...


You can try this code using the online interpreter:
or you can download the JFuzuli Editor:

Sunday, July 27, 2014

Fuzuli Programming Language and Editor

Our programming language, Fuzuli, now has a new interpreter written in Java which is officially called JFuzuli.

You can try it online at site

We also get our first JFuzuli Editor ready for downloading at

Please feel free and do not hesisate to share your thoughts about the language and the interpreter.

You can also visit the Facebook page which is aimed to inform Turkish users using the address

Monday, June 16, 2014

RCaller 2.4 has just been released

Rcaller turtle The key properties of this release:
  • Added deleteTempFiles() method in class RCaller for deleting temporary files that are created by RCaller at any time. 
  • runiversal.r is now more compact
  • StopRCallerOnline() method in class RCaller now stops the R instances in the memory which are created in runAndReturnResultOnline(). Click to see the example for RCaller.stopRCallerOnline() method.
The next release 2.5 will be submitted in 15th July 2014.

Get informed using the formal blog

 Download page:

 Source code:

 Home page:

 Journal Documentation:

Friday, June 13, 2014

R GUI written in Java using RCaller

This video demonstrates how the Java version of R GUI based on RCaller is now faster after the speed improvements. This simple gui is available in the source tree. Typed commands are passed to R using the online call mechanism of RCaller and there is a single active R process at the background. 

Please follow the rcaller label in this blog site to achive latest RCaller news, updates, examples and other materials. 

Have a nice watching!

Scholarly papers, projects and thesis that cite RCaller

paperRCaller is now in its 4th year with its version of 2.3 and it is considerable mature now. It is used in many commercial projects as well as scholarly papers and thesis. Here is the list of scholarly papers, projects and thesis that I stumbled upon in Google Scholar.  

  • Niya Wang, Fan Meng, Li Chen, Subha Madhavan, Robert Clarke, Eric P. Hoffman, Jianhua Xuan, and Yue Wang. 2013. The CAM software for nonnegative blind source separation in R-Java. J. Mach. Learn. Res. 14, 1 (January 2013), 2899-2903.
  • Meng, Fan. Design and Implementation of Convex Analysis of Mixtures Software Suite, Master's Thesis, 2012. Abstract: Various convex analysis of mixtures (CAM) based algorithms have been developed to address real world blind source separation (BSS) problems and proven to have good performances in previous papers. This thesis reported the implementation of a comprehensive software CAM-Java, which contains three different CAM based algorithms, CAM compartment modeling (CAM-CM), CAM non-negative independent component analysis (CAM-nICA), and CAM non-negative well-grounded component analysis (CAM-nWCA). The implementation works include: translation of MATLAB coded algorithms to open-sourced R alternatives. As well as building a user friendly graphic user interface (GUI) to integrate three algorithms together, which is accomplished by adopting Java Swing API.In order to combine R and Java coded modules, an open-sourced project RCaller is used to handle the establishment of low level connection between R and Java environment. In addition, specific R scripts and Java classes are also implemented to accomplish the tasks of passing parameters and input data from Java to R, run R scripts in Java environment, read R results back to Java, display R generated figures, and so on. Furthermore, system stream redirection and multi-threads techniques are used to build a simple R messages displaying window in Java built GUI.The final version of the software runs smoothly and stable, and the CAM-CM results on both simulated and real DCE-MRI data are quite close to the original MATLAB version algorithms. The whole GUI based open-sourced software is easy to use, and can be freely distributed among the communities. Technical details in both R and Java modules implementation are also discussed, which presents some good examples of how to develop software with both complicate and up to date algorithms, as well as decent and user friendly GUI in the scientific or engineering research fields.
  • Emanuel Gonçalves, Julio Saez-Rodriguez. Cyrface: An interface from Cytoscape to R that provides a user interface to R packages, F1000Research 2013, 2:192 Last updated: 20 JAN 2014,