I am simply trying to load ascii files with two columns of data (spectral data).
They were saved originally as .asc.
I need to open and edit them using text editor before I can load them into Matlab to erase the headers, but some of them somehow got converted to unix executable foramt with the .asc extension. And others are plain text docs also with the same extension. I have no idea why they got saved with the same extension and with my same manipulation as different kind formats.
When I use the load command in Matlab, the plain text docs load normally as expected but the ones saved as unix executable kinds give me this error:
Error using load Unable to read file filename.asc: No such file or
directory.
How can I either resave them (still with the same extension) or otherwise load them to be read by Matlab as standard two column data matrixes?
Thanks!
If these are truly plain text files, try renaming the file from xxx.asc to xxx.txt. Then, see if you are able to edit them as desired.
Related
I am able to open large files and it works great, however I do not get line numbers even though that option is on by default. It does for xml files, but a text file with .xml extension does not.
Any ideas on how to get the line numbers or maybe the software is not meant to do that?
The Large File Editor does not display line numbers.
It does have the concept of lines, so you can move to a specific line using menu Edit->Go to... (Ctrl+G).
Depending on your PCs specification, you may be able to open larger files without invoking the Large File Editor, please see:
Opening Large XML Documents in Liquid XML Studio
For this project we have been given code, and will be changing some inputs and assumptions. Thus, I already possess the original codes, but just changing all the creator's file paths to match my own computer is yielding me a lot of trouble. The following, and many variations of, continually yield errors.
load \Users\myname\Library\Documents\...
The error is
Error using load
'Unable to read file
\Users\myname\Library\Documents...'.
No such file or directory.
My files are stored in my Documents. Another person in my group on windows has used
load C:\Users\hisname\Desktop\...
Is there something I'm missing in my line, similar to the C drive but on Mac? Is my code just completely wrong, I'm able to load files in R quite easily, but Matlab is posing a huge hurdle. I have no experience with Matlab and have been asked simply to run this code.
On the Mac, path components are separated by /, not \. Thus, you should type
load /Users/myname/Documents/filename.mat
You can use the location bar at the top of the command window to change to the directory where your file is located, and then you can type
load filename
to load filename.mat.
Also, are you sure you have a Documents directory under Library? Why?
To run code from a file called "my_file.m", than just open your Matlab and type run my_file.m. This will run your script in the Command Window.
The load function is used, if you want to load a .mat file. These are normally files, where variables from your workspace are stored.
I am trying to write a script that will allow me to download numerous (1000s) of data files from a data server (e.g, http://hydro1.sci.gsfc.nasa.gov/thredds/catalog/GLDAS_NOAH10SUBP_3H/2011/345/). Unfortunately, the names of the files in each directory are not formatted in a similar way (the time that they were created were appended to the end of the file name). I need to be able to specify the file name to subset the data (I have a special tool for these data types) and download it. I cannot find a function in matlab that will extract the file names.
I have looked at URLREAD, but it downloads everything including html code.
Thanks for your help!
You can easily parse the link.
x=urlread(url)
links=regexp(x,'<a href=''([^>]+)''>','tokens')
Reads every link, you have to filter all unwanted links.
For example this gets all grb files:
a=regexp(x,'<a href=''([^>]+.grb)''>','tokens')
I'm using MATLAB under Windows, and trying to display (dump) the contents of a text file in the command shell. It seems like overkill to open a small file in the editor, or to load the file to use disp.
Use type and specify the explicit file name (including the extension), for instance:
type('myfile.txt')
As well as type, there's also dbtype which lets you pick a start and end range to print, and shows line numbers - handy for listing source files.
I'm trying to open a .mat file in the windows environment but it is failing. It was created in a Unix environment. Also note that this file was first put in a .tar file first, ftp via binary method. The file opens in Unix and I don't think it was corrupted in any way.
The *.mat file format is platform agnostic. The OS does not matter.
There are a number of variants of the *.mat file which have been used, and older versions cannot always read formats saved with newer versions. You can save to an older version using flags available in the save command. These formats have been updated as the Matlab feature set has demanded a more flexible file format, and as other technologies have advanced, most notably HDF5 in the recent version.
Finally, the save command supports an ASCII formatted option. I suspect this is your current problem, based on your comment regarding the error message received.
To address your current problem:
First, check to see if the file is an ASCII file. The easiest way is to simply open it in notepat, wordpad, or even the matlab editor. If the file is text, then this becomes a file parsing problem, and the appropriate use of fscanf shoudl fix the problem.
If the file is actually a binary *.mat file then you probably have a Matlab version incompatability. Yuo can either go back to the source unix environment and save to an older version (eg save .... -v7) or update the Matlab version of the reading computer.