donpir/jmatrw

Java Library to read/write *.MAT Files

jmatrw's Issues

Read two dimensional Matrix

The library must be able to read *.mat file with matrix inside.

Retrieve the name of the array

When the library reads the array from the file it already reads the array name, but actually it is not returned to the client code. Insert the array name in the JMATData structure.

[JMATRW4Spark] Implement a custom splitter

The need is to have a custom splitter for the mat files. They are binary file and have metadata, for instance the description of the mat version and the software used to create it. So, the splitting can not be based on the file length as do spark standard splitters.

Create the maven project

Create the maven project and upload it on github.

[JMATRW Core] Support miCompressed data

A mat file can compress an array using gzip. The library must support this format.

[JMATRW4Analystics] Parse math string with + and - operators along with * and /

Include the sum and sub to the formula parser

Provide the license header in every single Java file

Add an header with license info in every java file.

Bug with array of length 57600

Test the library with an array of length 57600

Custom InputFormat to use with Apache Spark

The idea is to implement a custom InputFormat to use with Apache Spark to read *.mat files and split huge array/matrix on multiple nodes.

[JMATRW4Analytics] Read decimal constants in the math formula

JMATRW4Analystics has a module to parse string with mathematical expressions and produce a syntax tree. Actually the library does not read decimal constants.

Bug with array of length 32784 and 65568

When reading arrays of 8196 length, the retrieved array size is negative.

Main Classes must be the reader

In order to simplify the library usage, it is useful that the class to instantiate for reading is "JMatReader" and not JMatControl that is for internal usage.

[JMATRW4Analytics] Serializable parser and evaluator

In order to use the parser with spark it requires to be serializable

[JMATRW] Method to reset the reader

It would be useful to have a method to reset the reader and start from the beginning.

In this way it is possible to read the mat array many times from the beginning.

[JMATRW] Read matrix file

Read the mat file with matrix data.

Try to import JMATRW in Apache Spark

Import the JMATRW library in apache spark.