Saving a variable
in [Matlab]
|
Prev: read vrml
Next: Add / Genpath without overwrite?
From: Richard Wylde on 23 Jun 2010 08:19 Hi there, I have a script where a variable is calculated (let's call it 'calcvariable'). However, I want to ask the user what name they want to save the variable as. Obviously I know about the input('.....') function, but how do I use that in such a way that it asks what to name a variable that has already been calculated (calcvariable), and then saves it in the .mat file as a new array? Regards, Richard.
From: someone on 23 Jun 2010 09:22 "Richard Wylde" <rwylde(a)gmail.com> wrote in message <hvsu3o$s37$1(a)fred.mathworks.com>... > Hi there, > > I have a script where a variable is calculated (let's call it 'calcvariable'). However, I want to ask the user what name they want to save the variable as. Obviously I know about the input('.....') function, but how do I use that in such a way that it asks what to name a variable that has already been calculated (calcvariable), and then saves it in the .mat file as a new array? > > > Regards, > > Richard. I believe you will need to use the "evil" eval command to do this. See the answer to Q4.6 of the MATLAB FAQ at: http://matlabwiki.mathworks.com/MATLAB_FAQ Although you don't need the looping part, one of those solutions should put you on the right track.
From: Walter Roberson on 23 Jun 2010 09:34 Richard Wylde wrote: > I have a script where a variable is calculated (let's call it > 'calcvariable'). However, I want to ask the user what name they want to > save the variable as. Obviously I know about the input('.....') > function, but how do I use that in such a way that it asks what to name > a variable that has already been calculated (calcvariable), and then > saves it in the .mat file as a new array? UseableVar = genvarname(UserVarName); SaveStruct.(UseableVar) = calcvariable; save(UserFileName, SaveStruct, '-struct'); Instead of this saving SaveStruct itself into the file, it will save the fields of SaveStruct, which will be the name the user requested.
From: Richard Wylde on 24 Jun 2010 04:46 Walter Roberson <roberson(a)hushmail.com> wrote in message <S3oUn.3967$kn1.774(a)newsfe16.iad>... > Richard Wylde wrote: > > > I have a script where a variable is calculated (let's call it > > 'calcvariable'). However, I want to ask the user what name they want to > > save the variable as. Obviously I know about the input('.....') > > function, but how do I use that in such a way that it asks what to name > > a variable that has already been calculated (calcvariable), and then > > saves it in the .mat file as a new array? > > UseableVar = genvarname(UserVarName); > SaveStruct.(UseableVar) = calcvariable; > save(UserFileName, SaveStruct, '-struct'); > > Instead of this saving SaveStruct itself into the file, it will save the > fields of SaveStruct, which will be the name the user requested. Thanks, that's really helpful. I'm having a little trouble implementing it though. This is what I have (and I'm aware the code is less than graceful): % 22nd June 2010 % Function to average data variable = input('Enter variable name: '); insize = size(variable); numinsize = insize(1); period = input('Enter current data interval (mins): '); time = input('Enter period to average data over (mins): '); divider = time/period; averagev = mean(reshape(variable,divider,[])); finalv = averagev' finalv = genvarname(finalv); SaveStruct.(finalv) = finalv; save(UserFileName, SaveStruct, '-struct'); which outputs the error: ??? Error using ==> genvarname First input argument, VARNAME, must be either a CHAR array or a cell array of strings. Error in ==> average at 11 finalv = genvarname(finalv); Any suggestions?
From: Jan Simon on 24 Jun 2010 06:58
Dear Richard! > variable = input('Enter variable name: '); > ... > finalv = averagev' > finalv = genvarname(finalv); > SaveStruct.(finalv) = finalv; Nope. finalName = genvarname(variable); SaveStruct.(finalName) = finalv; etc. Good luck, Jan |