Can freemat open .mat files

However it is also possible to write the answer in a variable. For example:. The last command will only write the result in variable obj without showing anything on screen. This can also be put in a variable:. So everywhere a handle is needed, you can also use the model name. You can even mix the two methods. In the next part of this documentation, the handle is used. But if you name the model, the name could thus also be used. The fmlpsolve driver sees all provided matrices as sparse matrices.

The fmlpsolve driver always uses the ex routines to provide the data to lpsolve. This results in the most performing behaviour.

Note that if a dense matrix is provided, the dimension must exactly match the dimension that is expected by fmlpsolve. Matrices with too few or too much elements gives an 'invalid vector. Sparse matrices can off course provide less elements the non provided elements are seen as zero. However if too many elements are provided or an element with a too large index, again an 'invalid vector. Most of the time, fmlpsolve needs vectors rows or columns.

In all situations, it doesn't matter if the vectors are row or column vectors. The driver accepts them both. An important final note. In the FreeMat interface, there is never an unused element in the matrices. The fmlpsolve FreeMat driver however also allows specifying a vector to set the integer status of all variables at once. See following example. Above example can thus also be done as follows: Note that you can execute this example by entering command per command as shown below or by just entering example2.

This will execute example2. You can see its contents by entering type example2. Note the usage of 1. This stands for 'infinity'. Meaning an infinite upper bound. It is also possible to use This can for example be used to create a free variable. By default the function returns it in dense format for backwards compatibility.

However if a 3rd argument is provided that is non-zero, the returned matrix is sparse:. To show the full power of the matrices, let's now do some matrix calculations to check the solution.

It works further on above example:. So what we have done here is calculate the values of the constraints RHS by multiplying the constraint matrix with the solution vector. Now take a look at the values of the constraints that lpsolve has found:.

So what we have done here is calculate the value of the objective by multiplying the objective vector with the solution vector. Now take a look at the value of the objective that lpsolve has found:. One could define all the possible constants in FreeMat and then use them in the calls, but that has several disadvantages. First there stays the possibility to provide a constant that is not intended for that particular call.

Another issue is that calls that return a constant are still returning it numerical. Both issues can now be handled by string constants. The above code can be done as following with string constants:. This is not only more readable, there is much lesser chance that mistakes are being made. The calling routine knows which constants are possible and only allows these. So unknown constants or constants that are intended for other calls are not accepted. Note the difference between the two error messages.

The first says that the constant is not known, the second that the constant cannot be used at that place. Constants are case insensitive. Internally they are always translated to upper case. Also when returned they will always be in upper case. The constant names are the ones as specified in the documentation of each API routine. There are only 3 exceptions, extensions actually. Some constants can be a combination of multiple constants. There may optinally be spaces before and after the.

Not all OR combinations are legal. They may not be combined with each other. This is also tested:. Everywhere constants must be provided, numeric or string values may be provided. The routine automatically interpretes them. Returning constants is a different story. Numerical or as string. Completing the load of the compressed file requires only the relatively short time to decompress the data. The amount of data in each item is small relative to the complexity of its container.

For example, simple numeric arrays take less time to compress and uncompress than cell or structure arrays of the same size. Compressing arrays that result in an uncompressed file size of less than 3 MB offers limited benefit, unless you are transferring data over a network. The time required to load part of a variable from a Version 7.

Each chunk that contains any portion of the data you want to load must be fully uncompressed to access the data. Rechunking your data can improve the performance of the load operation. Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select:. Select the China site in Chinese or English for best site performance.

Other MathWorks country sites are not optimized for visits from your location. Toggle Main Navigation. Search MathWorks. You can try python though, check this: docs. You can open them with Octave. See this link: stackoverflow. Have you considered just downloading a trial version of MATLAB, reading the files, saving them to a text format, and uninstalling again?

That might be easier than any of the other options. They can be open with any text editor. Try other simpler options first as given in comments and answers , but if all else fail, you can try to recover your data by digging directly into the. Show 2 more comments. Active Oldest Votes. As NKN and Ergodicity mentioned, there are python libaries available for this as well. Improve this answer. Community Bot 1 1 1 silver badge. Mad Physicist Mad Physicist No problem. Don't forget to upvote answers you like and to select the one you like best.

I know friend. Add a comment. A lightweight tool with an easy point and click interface I would not be surprised if this still works, but I can't guarantee it.

Dennis Jaheruddin Dennis Jaheruddin I found this link that supports Dennis's answer about the total commander: totalcmd. The link is dead. AllenH AllenH 1 1 gold badge 4 4 silver badges 13 13 bronze badges.

But it only supports 1D and 2D mat file. You don't need to download any new software. You can use Octave Online to open. Billy Yancey Billy Yancey 19 1 1 bronze badge. The question was about ".