How to create a function that makes a .txt file w/ file name as parameter
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From: Olli-Pekka Hämäläinen on 18 Jun 2010 07:08 Hello folks, in need of a little help. I'm trying to construct a function that would create datapoints according to some equations and rules I've entered & parameters that are given by user. Everything works fine, but with the current code I can only make a file "testdata.txt". I'd like to change this so that the user could give the desired file name as an input parameter. How on earth can I do this? Current code is: function z=CreateTPs(Form,R,maxstress,minstress,totalN,kNperV,c) %(blablabla) fid = fopen('testdata.txt', 'w'); fprintf(fid, '%6.2f\r\n', turningpoints); fclose(fid); My goal would be to give a form like this: function z=CreateTPs(Form,R,maxstress,minstress,totalN,kNperV,c,filename) or function z=CreateTPs(Form,R,maxstress,minstress,totalN,kNperV,c,'filename') example: CreateTPs(1,0,600,20,5000,50,256,'craneload1') and now get the program to make a file craneload1.txt. Any help appreciated so that I can get this thing working and then I can move on to banging my head against a wall with the GUI stuff. :)
From: Rune Allnor on 18 Jun 2010 08:03 On 18 Jun, 13:08, "Olli-Pekka Hämäläinen" <olli- pekka.hamalai...(a)lut.fi> wrote: > Hello folks, in need of a little help. > > I'm trying to construct a function that would create datapoints according to some equations and rules I've entered & parameters that are given by user. Everything works fine, but with the current code I can only make a file "testdata.txt". I'd like to change this so that the user could give the desired file name as an input parameter. How on earth can I do this? Current code is: > > function z=CreateTPs(Form,R,maxstress,minstress,totalN,kNperV,c) > > %(blablabla) > > fid = fopen('testdata.txt', 'w'); > fprintf(fid, '%6.2f\r\n', turningpoints); > fclose(fid); > > My goal would be to give a form like this: > > function z=CreateTPs(Form,R,maxstress,minstress,totalN,kNperV,c,filename) > or > function z=CreateTPs(Form,R,maxstress,minstress,totalN,kNperV,c,'filename') > > example: > > CreateTPs(1,0,600,20,5000,50,256,'craneload1') > > and now get the program to make a file craneload1.txt. > > Any help appreciated so that I can get this thing working and then I can move on to banging my head against a wall with the GUI stuff. :) doc sprintf Rune
From: Steven Lord on 18 Jun 2010 09:16 "Olli-Pekka Hämäläinen" <olli-pekka.hamalainen(a)lut.fi> wrote in message news:hvfk2l$905$1(a)fred.mathworks.com... > Hello folks, in need of a little help. > > I'm trying to construct a function that would create datapoints according > to some equations and rules I've entered & parameters that are given by > user. Everything works fine, but with the current code I can only make a > file "testdata.txt". I'd like to change this so that the user could give > the desired file name as an input parameter. How on earth can I do this? > Current code is: > > function z=CreateTPs(Form,R,maxstress,minstress,totalN,kNperV,c) > > %(blablabla) > > fid = fopen('testdata.txt', 'w'); Note that you could just as easily have written this: filename = 'testdata.txt'; fid = fopen(filename, 'w'); -- Steve Lord slord(a)mathworks.com comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ To contact Technical Support use the Contact Us link on http://www.mathworks.com
From: Olli-Pekka Hämäläinen on 21 Jun 2010 12:02 "Steven Lord" <slord(a)mathworks.com> wrote in message <hvfrjf$1p2$1(a)fred.mathworks.com>... > > "Olli-Pekka H채m채l채inen" <olli-pekka.hamalainen(a)lut.fi> wrote in message > news:hvfk2l$905$1(a)fred.mathworks.com... > > Hello folks, in need of a little help. > > > > I'm trying to construct a function that would create datapoints according > > to some equations and rules I've entered & parameters that are given by > > user. Everything works fine, but with the current code I can only make a > > file "testdata.txt". I'd like to change this so that the user could give > > the desired file name as an input parameter. How on earth can I do this? > > Current code is: > > > > function z=CreateTPs(Form,R,maxstress,minstress,totalN,kNperV,c) > > > > %(blablabla) > > > > fid = fopen('testdata.txt', 'w'); > > Note that you could just as easily have written this: > > filename = 'testdata.txt'; > fid = fopen(filename, 'w'); > > -- > Steve Lord > slord(a)mathworks.com > comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ > To contact Technical Support use the Contact Us link on > http://www.mathworks.com > OK, I understand the sprintf now, but it only gives me freedom to add a number tag like testdata01.txt. Is there really no way that I could give a name to my data file in an arbitrary form?
From: someone on 21 Jun 2010 13:12
"Olli-Pekka Hämäläinen" <olli-pekka.hamalainen(a)lut.fi> wrote in message <hvo2ed$dkg$1(a)fred.mathworks.com>... > "Steven Lord" <slord(a)mathworks.com> wrote in message <hvfrjf$1p2$1(a)fred.mathworks.com>... > > > > "Olli-Pekka H채m채l채inen" <olli-pekka.hamalainen(a)lut.fi> wrote in message > > news:hvfk2l$905$1(a)fred.mathworks.com... > > > Hello folks, in need of a little help. > > > > > > I'm trying to construct a function that would create datapoints according > > > to some equations and rules I've entered & parameters that are given by > > > user. Everything works fine, but with the current code I can only make a > > > file "testdata.txt". I'd like to change this so that the user could give > > > the desired file name as an input parameter. How on earth can I do this? > > > Current code is: > > > > > > function z=CreateTPs(Form,R,maxstress,minstress,totalN,kNperV,c) > > > > > > %(blablabla) > > > > > > fid = fopen('testdata.txt', 'w'); > > > > Note that you could just as easily have written this: > > > > filename = 'testdata.txt'; > > fid = fopen(filename, 'w'); > > > > -- > > Steve Lord > > slord(a)mathworks.com > > comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ > > To contact Technical Support use the Contact Us link on > > http://www.mathworks.com > > > > OK, I understand the sprintf now, but it only gives me freedom to add a number tag like testdata01.txt. Is there really no way that I could give a name to my data file in an arbitrary form? Did you read Stephen's suggestion above? Simply use something like: function z=CreateTPs(Form,R,maxstress,minstress,totalN,kNperV,c,filename) .... fid = fopen(filename, 'w'); .... |