Read mat file

ParseError: Unexpected field name length: 43 — Aleksejs Fomins. Show 3 more comments. Reading the file import scipy. Daksh Daksh 10 10 silver badges 22 22 bronze badges. Daniel Daniel You got the error when trying this answers? That is odd, it does not use pylab. But I can give some advice here: First read the documentation.

Use a hex editor such as HxD and look into a reference. Try to figure out the meaning of each byte by saving the bytes to a. That's a somehow crazy documentation provided by mathworks. To read mat file to pandas dataFrame with mixed data types import scipy. There is a great library for this task called: pymatreader. The name of this key can ofcourse be changed between different files.

Sameer Gadekar Sameer Gadekar 62 3 3 bronze badges. Nannigalaxy Nannigalaxy 2 2 silver badges 11 11 bronze badges. At least for. Yes, I just put it there as clarification for future people looking at this : — emilaz. The Overflow Blog.

Podcast Making Agile work for data science. Stack Gives Back Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Visit chat. Linked See more linked questions. Related Hot Network Questions. Question feed. An error occurs if the data type of the data in the MAT file does not match the inherited data type. When you load data for a scalar or multidimensional signal, you can choose to inherit the output data type, or you can specify the output data type to match the data type of the data in the MAT file.

Bus object that defines the output bus. Click the Show data type assistant button to display the Data Type Assistant , which helps you set the data type attributes.

The Sample time parameter specifies when the block computes a new output value during simulation. For details, see Specify Sample Time. Specify the Sample time parameter as a scalar when you do not want the output to have a time offset. To add a time offset to the output, specify the Sample time parameter as a 1 -by- 2 vector where the first element is the sampling period and the second element is the offset.

By default, the Sample time parameter value is 0 , which indicates continuous sample time with no time offset. For a discrete signal, specify the Sample time as the discrete sampling interval. For example, specify the Sample time as 0. Specify the Sample time as -1 to inherit the value. Extrapolation method used to determine output values for simulation times before the first sample in the MAT file data.

How the block determines the output value depends on the type of data in the MAT file. For double data, the From File block linearly extrapolates the output value using the first two samples. Linearly extrapolates the output value using the first two samples in the MAT file data.

If the MAT file data only contains one sample, the From File block provides that value at the output. Do not use the Linear extrapolation option when the From File block loads enumerated or fixed-point data.

The extrapolation setting is applied to all signals in a bus. If any signal in the bus contains enumerated or fixed-point data, do not use the Linear extrapolation option. Fixed-point data types — Representation for value of 0 , which may not be exactly 0 due to scaling and limited precision. Interpolation method used to determine output values for simulation times between samples in the MAT file data.

For double data, the From File block linearly interpolates the output value using data values before and after the simulation time that needs an output value. For all other built-in numeric data types, the From File block:.

Linearly interpolates the output value using the MAT file data values before and after the simulation time that needs an output value. For Boolean data, if the simulation time is between two workspace data points with different values, the From File block positions the value transition halfway between the MAT file data points.

For example, if the data transitions from true to false , the From File block provides an output value of true for simulation times in the first half of the interval between the MAT file data points and an output value of false for simulation times in the latter half of the interval. Do not use the Linear interpolation option when the From File block loads enumerated data.

The interpolation setting is applied to all signals in a bus. If any signal in the bus contains enumerated data, do not use the Linear interpolation option. The From File block holds each data value from one sample to the next.

The output value for a simulation time between two samples in the MAT file data is the value of the sample that precedes the simulation time. Extrapolation method used to determine output values for simulation times after the last sample in the MAT file data.

For double data, the From File block linearly extrapolates the output value using the last two samples in the MAT file. Linearly extrapolates the output value using the last two samples in the MAT file data. Do not use the Linear extrapolation option when the From File block loads enumerated data. If any signal in the bus contains enumerated data, do not use the Linear extrapolation option.

Zero-crossing detection locates discontinuities, or zero crossings , in the block output and prevents excessively small time steps near the discontinuities, which can slow down a simulation. You can enable zero-crossing detection for the From File block when the Sample time parameter is set to 0 for continuous sample time. The loaded data creates a discontinuity in the block output when the data includes multiple samples with the same time. Saving to an earlier file format version may avoid this problem as well.

MAT v7. However, there exist other R packages that can parse HDF5, e. CRAN package h5 and Bioconductor package rhdf5. Reads a MAT file structure from an input stream, either until End of File is detected or until maxLength bytes has been read.

Using maxLength it is possible to read MAT file structure over socket connections and other non-terminating input streams. In such cases the maxLength has to be communicated before sending the actual MAT file structure. Gilbert et al.

Matrix Anal. Arguments con.