KMEANS Trains a k means cluster model.CENTRES = KMEANS(CENTRES, DATA, OPTIONS) uses the batch K-means
algorithm to set the centres of a cluster model. The matrix DATA
represents the data which is being clustered, with each row
corresponding to a vector. The sum of squares Error function is used.
The point at which a local minimum is achieved is returned as
CENTRES.
A collection of LDPC(Low-Density Parity-Codes) tools. Including: Code construction Density Evolution Decoding Algorithm Girth average Counter Stopping set and Error Floor,etc
This LDPC software is intended as an introduction to LDPC codes computer based simulation. The pseudo-random irregular low density parity check matrix is based on Radford M. Neal’s programs collection, which can be found in [1]. While Neal’s collection is well documented, in my opinion, C source codes are still overwhelming, especially if you are not knowledgeable in C language. My software is written for MATLAB, which is more readable than C. You may also want to refer to another MATLAB based LDPC source codes in [2], which has different flavor of code-writing style (in fact Arun has Error in his log-likelihood decoder).
Matlab is an ideal tool for simulating digital communications systems, thanks to
its easy scripting language and excellent data visualization capabilities. One of the
most frequent simulation tasks in the field of digital communications is bit-Error-
rate testing of modems. The bit-Error-rate performance of a receiver is a figure of
merit that allows different designs to be compared in a fair manner. Performing
bit-Error-rate testing withMatlab is very simple, but does require some prerequisite
knowledge
This LDPC software is intended as an introduction to LDPC codes computer based simulation. The pseudo-random irregular low density parity check matrix is based on Radford M. Neal’s programs collection, which can be found in [1]. While Neal’s collection is well documented, in my opinion, C source codes are still overwhelming, especially if you are not knowledgeable in C language. My software is written for MATLAB, which is more readable than C. You may also want to refer to another MATLAB based LDPC source codes in [2], which has different flavor of code-writing style (in fact Arun has Error in his log-likelihood decoder).
linux下用C語言寫的聊天程序！/*BUG and NOTE:
Not join protect to Shared Memory Segments,example Semaphore Arrays.
Not check the parameters validity.
When transmit may be Error.
If the client program no right exit,others cannot know,the service program shouldbe check the client program whether exist timing.
The program when exit(), it do not delete the Shared Memory Segments,you maybe use atexit() but the program have some processes.
When one process is exit(),others is continue.
The service program s action is few.
And so on. */
