An intuitive, Pythonic way to work with tabular data

# Python DataMatrix

An intuitive, Pythonic way to work with tabular data.

Sebastiaan Mathôt
https://pydatamatrix.eu/ DataMatrix is an intuitive Python library for working with column-based and continuous data. It's a light-weight and easy-to-use alternative to pandas.

datamatrix is also one of the core libraries of OpenSesame, a graphical experiment builder for the social sciences, and Rapunzel, a modern code editor for numerical computing with Python and R.

## Ultra-short cheat sheet

from datamatrix import DataMatrix, io
# Read a DataMatrix from file
# Create a new DataMatrix
dm = DataMatrix(length=5)
# The first two rows
print(dm[:2])
# Create a new column and initialize it with the Fibonacci series
dm.fibonacci = 0, 1, 1, 2, 3
# Remove 0 and 3 with a simple selection
dm = (dm.fibonacci > 0) & (dm.fibonacci < 3)
# Get a list of indices that match certain criteria
print(dm[(dm.fibonacci > 0) & (dm.fibonacci < 3)])
# Select 1, 1, and 2 by matching any of the values in a set
dm = dm.fibonacci == {1, 2}
# Select all odd numbers with a lambda expression
dm = dm.fibonacci == (lambda x: x % 2)
# Change all 1s to -1
dm.fibonacci[dm.fibonacci == 1] = -1
# The first two cells from the fibonacci column
print(dm.fibonacci[:2])
# Column mean
print('Mean: %s' % dm.fibonacci.mean)
# Multiply all fibonacci cells by 2
dm.fibonacci_times_two = dm.fibonacci * 2
# Loop through all rows
for row in dm:
print(row.fibonacci) # get the fibonacci cell from the row
# Loop through all columns
for colname, col in dm.columns:
for cell in col: # Loop through all cells in the column
print(cell) # do something with the cell
# Or just see which columns exist
print(dm.column_names)


## Dependencies

• Python >= 3.7

Optional:

• numpy and scipy for using the FloatColumn, IntColumn, and SeriesColumn objects
• prettytable for creating a text representation of a DataMatrix (e.g. to print it out)
• openpyxl for reading and writing .xlsx files
• fastnumbers for improved performance

## Installation

### PyPi

pip install python-datamatrix


### Anaconda

conda install datamatrix -c conda-forge


### Ubuntu

sudo add-apt-repository ppa:smathot/cogscinl
sudo apt-get update
sudo apt install python3-datamatrix


## Documentation

python-datamatrix is licensed under the GNU General Public License v3.

## Project details

This version 0.14.3 0.14.2 0.14.1 0.13.2 0.13.1 0.13.0 0.12.1 0.12.0 0.11.1 0.11.0 0.10.19 0.10.18 0.10.17 0.10.15 0.10.14 0.10.13 0.10.12 0.10.11 0.10.10 0.10.8 0.10.7 0.10.6 0.10.5 0.10.4 0.10.3 0.10.2 0.10.1 0.10.0 0.9.14 0.9.13 0.9.12 0.9.11 0.9.10 0.9.9 0.9.8 0.9.7 0.9.6 0.9.5 0.9.4 0.9.3 0.9.2 0.9.1 0.8.3 0.8.2 0.8.1 0.8.0 0.7.1 0.7.0 0.6.3 0.6.2 0.6.1 0.6.0 0.5.0 0.4.15 0.4.14 0.4.13 0.4.12 0.4.11 0.4.10 0.4.9 0.4.8 0.4.7 0.4.6 0.4.4 0.4.3 0.4.2 0.4.1 0.3.8 0.3.7 0.3.6 0.3.5 0.3.4 0.3.3 0.3.2 0.3.1 0.3.0 0.2.0 0.1.2 0.1.1 0.1.0

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