Loading files

I have the files with extensions .3dd,.pgm and .ascii and i want to load these files in matlab. Please help how can i do that.

Thanks

Answer 1

[Sarah Wait Zaranek]

I find this chart helpful. It lists the file types that core MATLAB can read/write and what functions to use.

http://www.mathworks.com/help/techdoc/ref/fileformats.html

As to your specific question, core MATLAB can read .ascii and .pgm.

I don't think .3dd is supported out of the box.

[developer]

Thanks actually i have seen this before and it contain PGM but not ASCII

[Sarah Wait Zaranek]

ascii can be read with any of the text readers --- click on the documentation of that function to find out more. Most do it out of the box, but load requires letting it know it is ascii and not a mat-file.

Answer 2

[Walter Roberson]

Which .3dd format? There are at least three of them. Are you referring to the one used for some mapping software ?

[developer]

Yes actually i want to use a 3D laser scanner data to apply 3D SLAM(Simultaneous Localization & Mapping) technique.

So the sensor is giving me frames in ascii, pgm and 3dd extensions and i want to use these files in matlab

[Walter Roberson]

Session 2 of the below should have relevant MATLAB code, but not necessarily for those file formats

http://www.robots.ox.ac.uk/~SSS06/Website/index.html