Re: [julia-users] A Test Matrix Collection for Julia

[Weijian Zhang]

Hello,

I have added 10 test matrices to the collection. 
(https://github.com/weijianzhang/MatrixDepot.jl)
More matrices are on the way. 

Please let me know if you have any suggestions so that I can make quick 
changes at this stage.

Thanks,

Weijian


On Wednesday, 26 November 2014 12:13:27 UTC, Weijian Zhang wrote:
>
> Dear Tamas,
>
> Thanks for your suggestion. 
>
> After seeing your post, I spent some time trying to know the difference 
> between
> symbols and strings. This stackoverflow post 
>  
> was helpful. I think both symbols 
> and strings are fine for Matrix Depot, as you said this is more of a 
> matter of taste.
> But I would like to draw an analogy bewteen matrixdepot and readtable. See 
> for example:
>
> df = readtable("data.csv",header = false)
> A = matrixdepot("hilb", 3, 4)
>
> where "hilb" is really just a name of a matrix data, so string for me is 
> more natural. 
>
> Thanks,
>
> Weijian
>
> On Tuesday, 25 November 2014 11:56:32 UTC, Tamas Papp wrote:
>>
>> Hi, 
>>
>> This is a great idea. 
>>
>> Just a cosmetic suggestion: given that Julia has symbols, would it make 
>> sense to use them (eg :hilb, :cauchy) instead of strings for selection? 
>> Strings are popular in S/R/S-plus for this purpose, but the syntax of 
>> Julia is more lispy so symbols may feel more natural (but this is, of 
>> course, a matter of taste). 
>>
>> Best, 
>>
>> Tamas 
>>
>> On Tue, Nov 25 2014, Weijian Zhang  wrote: 
>>
>> > Hello, 
>> > 
>> > We are designing a test matrix collection for Julia. The idea is to use 
>> a 
>> > single function to call many different test matrices. It has some 
>> > similarity to MATLAB's gallery function but is more powerful. 
>> > 
>> > The function name is matrixdepot. Every matrix in the collection is 
>> > represented by a string, for example, the Cauchy matrix is represented 
>> by 
>> > "cauchy" and the Hilbert matrix is represented by "hilb". 
>> > 
>> > The properties of the matrices in the collection are also symbolized by 
>> > strings. For example, the class of the symmetric matrices is symbolized 
>> by 
>> > "symmetric". 
>> > 
>> >- 
>> > 
>> >matrixdepot(matrix_name, p1, p2, ...) returns a matrix specified by 
>> the 
>> >query string matrix_name.  p1, p2, ... are input parameters 
>> depending on 
>> >matrix_name. 
>> >- 
>> > 
>> >matrixdepot(matrix_name) returns the parameter options and the 
>> >properties of matrix_name. 
>> >- 
>> > 
>> >matrixdepot(property_name) returns a list of matrices with the 
>> property 
>> >property_name. 
>> > 
>> > 
>> > The main features are listed in the file matrixdepot_doc.html. All the 
>> code 
>> > is provided in the zip file. 
>> > 
>> > Please let us know if you have any suggestions or any features you 
>> think we 
>> > should add. 
>> > 
>> > Thanks, 
>> > 
>> > Weijian 
>>
>

Re: [julia-users] A Test Matrix Collection for Julia

[Weijian Zhang]

Dear Tamas,

Thanks for your suggestion. 

After seeing your post, I spent some time trying to know the difference 
between
symbols and strings. This stackoverflow post 
 was 
helpful. I think both symbols 
and strings are fine for Matrix Depot, as you said this is more of a matter 
of taste.
But I would like to draw an analogy bewteen matrixdepot and readtable. See 
for example:

df = readtable("data.csv",header = false)
A = matrixdepot("hilb", 3, 4)

where "hilb" is really just a name of a matrix data, so string for me is 
more natural. 

Thanks,

Weijian

On Tuesday, 25 November 2014 11:56:32 UTC, Tamas Papp wrote:
>
> Hi, 
>
> This is a great idea. 
>
> Just a cosmetic suggestion: given that Julia has symbols, would it make 
> sense to use them (eg :hilb, :cauchy) instead of strings for selection? 
> Strings are popular in S/R/S-plus for this purpose, but the syntax of 
> Julia is more lispy so symbols may feel more natural (but this is, of 
> course, a matter of taste). 
>
> Best, 
>
> Tamas 
>
> On Tue, Nov 25 2014, Weijian Zhang > 
> wrote: 
>
> > Hello, 
> > 
> > We are designing a test matrix collection for Julia. The idea is to use 
> a 
> > single function to call many different test matrices. It has some 
> > similarity to MATLAB's gallery function but is more powerful. 
> > 
> > The function name is matrixdepot. Every matrix in the collection is 
> > represented by a string, for example, the Cauchy matrix is represented 
> by 
> > "cauchy" and the Hilbert matrix is represented by "hilb". 
> > 
> > The properties of the matrices in the collection are also symbolized by 
> > strings. For example, the class of the symmetric matrices is symbolized 
> by 
> > "symmetric". 
> > 
> >- 
> > 
> >matrixdepot(matrix_name, p1, p2, ...) returns a matrix specified by 
> the 
> >query string matrix_name.  p1, p2, ... are input parameters depending 
> on 
> >matrix_name. 
> >- 
> > 
> >matrixdepot(matrix_name) returns the parameter options and the 
> >properties of matrix_name. 
> >- 
> > 
> >matrixdepot(property_name) returns a list of matrices with the 
> property 
> >property_name. 
> > 
> > 
> > The main features are listed in the file matrixdepot_doc.html. All the 
> code 
> > is provided in the zip file. 
> > 
> > Please let us know if you have any suggestions or any features you think 
> we 
> > should add. 
> > 
> > Thanks, 
> > 
> > Weijian 
>

Re: [julia-users] A Test Matrix Collection for Julia

[Tamas Papp]

Hi,

This is a great idea.

Just a cosmetic suggestion: given that Julia has symbols, would it make
sense to use them (eg :hilb, :cauchy) instead of strings for selection?
Strings are popular in S/R/S-plus for this purpose, but the syntax of
Julia is more lispy so symbols may feel more natural (but this is, of
course, a matter of taste).

Best,

Tamas

On Tue, Nov 25 2014, Weijian Zhang  wrote:

> Hello,
>
> We are designing a test matrix collection for Julia. The idea is to use a
> single function to call many different test matrices. It has some
> similarity to MATLAB's gallery function but is more powerful.
>
> The function name is matrixdepot. Every matrix in the collection is
> represented by a string, for example, the Cauchy matrix is represented by
> "cauchy" and the Hilbert matrix is represented by "hilb".
>
> The properties of the matrices in the collection are also symbolized by
> strings. For example, the class of the symmetric matrices is symbolized by
> "symmetric".
>
>-
>
>matrixdepot(matrix_name, p1, p2, ...) returns a matrix specified by the
>query string matrix_name.  p1, p2, ... are input parameters depending on
>matrix_name.
>-
>
>matrixdepot(matrix_name) returns the parameter options and the
>properties of matrix_name.
>-
>
>matrixdepot(property_name) returns a list of matrices with the property
>property_name.
>
>
> The main features are listed in the file matrixdepot_doc.html. All the code
> is provided in the zip file.
>
> Please let us know if you have any suggestions or any features you think we
> should add.
>
> Thanks,
>
> Weijian