Tag: netCDF

ncDataReader2 | version 2.3 coming soon

Version 2.3 of my data reader library is coming in the next days. Here’s a list of recent improvements and bug fixes: added CosWin approximation added constant extrapolation example GenerateBigFile is much faster now fixed a bug with Akima and default extrapolation near the right border that existed for a long time added functions to dump…


Reading dymolas mat-files with python

INFO: This post is outdated! Please have a look here. Dymola stores its simulation results in regular mat-files, but the program uses a special variable structure to store the data efficiently. An easy way to access the data is MATLAB, but I was looking for a more pythonic solution. If you want to access the…


How to convert a csv file to netCDF with 7 lines of python code

When preparing files for the ncDataReader2 I often have to convert text files that contain values separated by TABs or commas. In most simple cases this can be done with some lines of python code. An example is here: import sys, pupynere ll = [l.strip().split(‘,’) for l in open(sys.argv[1]) if not l.startswith(‘#’)] vv = zip(*[map(float,…


ncDataReader2 | 2.2.4

A new release 2.2.4 of ncDataReader2 is out. Some bugs were fixed and the API has slightly changed. This version should work both with Dymola and OpenModelica on Linux and Windows. When you have a DAP-enabled netcdf library  it will even fetch data from the web in background. I already did some Dymola simulations with…


ncDataReader2 | 2.2.1

A new minor release of ncDataReader2 is coming. It only fixes one important bug: Numerical  attributes (like scale_factor and add_offset) were not read correctly with 2.2.0. Source and binary packages will follow soon.


Accessing external data from Modelica with ncDataReader2

This example demonstrates the use of the library ncDataReader2 to access data sets from Modelica in a way suitable for the simulation system. The access is handled via external functions from Modelica which read and interpolate the data stored in netCDF files. Dymola is used as the simulation system here. As ncDataReader2 is a simple,…


ncDataReader2 | 2.2.0

A new release of ncDataReader2 is out. Changes include: switched from autoconf to cmake tested to compile on Linux, Windows and MacOS the easy API (EA) was completed EA works now with Modelica (Dymola): a weather file reader was implemented and tested with the  modelica library FluidFlow new documentation in english support for netCDF attributes…


ncDataReader2

|View all articles regarding ncDataReader2| ncDataReader2 is a library of C functions to access data stored in netCDF files using different interpolation and extrapolation methods. The aim of this library is to provide access from simulation systems like Modelica to data sets like weather data or measured time rows. As such systems usually require strict…