looping again
in [Matlab]
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From: Peter Smith on 29 Jul 2010 18:36 I think my earlier post may have been misunderstood; i have 310 .mat files - from these 310 files i want to : sequentially open up a variable - spreadMat : calculate an average of each of the numbers in spreadMat : insert the numbers into a matrix, where the dimentions are (length(dates), length(AveragDailySpread)) - so i will effectively insert one row for every file. Once i have done this for the first file i want it to loop through, inserting the appropriate data into the correct rows; I have this so far: rootDir = 'C:\Users\Alex Eptas\Desktop\ChiXDaily\'; % where all the .mat files are stored tmp = dir([rootDir '*.mat']); fnames = char({tmp.name}'); % the names of the .mat files which are in the form of 20101224_chix.mat clear tmp; dates = unique(cellstr(fnames(:,1:8))); %creates a list of dates from the filenames for i=1: length(dates) i.e. so for every date it will do the same thing load('C:\Users\Alex Eptas\Desktop\ChiXDaily\20080606_chix.mat', 'spreadMat'); % here is the problem - i need someway to make it do this; load('C:\Users\Alex Eptas\Desktop\ChiXDaily\date(i)_chix.mat', 'spreadMat'); then i will carry out the rest, i.e. AverageDailySpread = nanmean(spreadMat(:,1:244)); please could someone help me
From: Eduardo on 29 Jul 2010 19:05 "Peter Smith" <fe09ae(a)mail.wbs.ac.uk> wrote in message <i2svok$sll$1(a)fred.mathworks.com>... > I think my earlier post may have been misunderstood; > > i have 310 .mat files - from these 310 files i want to > : sequentially open up a variable - spreadMat > : calculate an average of each of the numbers in spreadMat > : insert the numbers into a matrix, where the dimentions are > (length(dates), length(AveragDailySpread)) - so i will effectively insert one row for every file. > Once i have done this for the first file i want it to loop through, inserting the appropriate data into the correct rows; > > I have this so far: > > > rootDir = 'C:\Users\Alex Eptas\Desktop\ChiXDaily\'; % where all the .mat files are stored > tmp = dir([rootDir '*.mat']); > > fnames = char({tmp.name}'); % the names of the .mat files which are in the form of > 20101224_chix.mat > > clear tmp; > > dates = unique(cellstr(fnames(:,1:8))); %creates a list of dates from the filenames > > for i=1: length(dates) i.e. so for every date it will do the same thing > > load('C:\Users\Alex Eptas\Desktop\ChiXDaily\20080606_chix.mat', 'spreadMat'); % here is the problem - i need someway to make it do this; > > load('C:\Users\Alex Eptas\Desktop\ChiXDaily\date(i)_chix.mat', 'spreadMat'); > > then i will carry out the rest, i.e. > > AverageDailySpread = nanmean(spreadMat(:,1:244)); > > please could someone help me How about: fpath = 'C:\Users\Alex Eptas\Desktop\ChiXDaily\'; for i = 1:length(dates) currentfile = fullfile(fpath, fnames(i)); load(currentfile,'spreadMat'); ... end
From: Peter Smith on 29 Jul 2010 19:24 thanks but unfortunately that does not work any other ideas?/ appreciate it "Eduardo " <bob1182006(a)yahoo.com> wrote in message <i2t1f1$f4h$1(a)fred.mathworks.com>... > "Peter Smith" <fe09ae(a)mail.wbs.ac.uk> wrote in message <i2svok$sll$1(a)fred.mathworks.com>... > > I think my earlier post may have been misunderstood; > > > > i have 310 .mat files - from these 310 files i want to > > : sequentially open up a variable - spreadMat > > : calculate an average of each of the numbers in spreadMat > > : insert the numbers into a matrix, where the dimentions are > > (length(dates), length(AveragDailySpread)) - so i will effectively insert one row for every file. > > Once i have done this for the first file i want it to loop through, inserting the appropriate data into the correct rows; > > > > I have this so far: > > > > > > rootDir = 'C:\Users\Alex Eptas\Desktop\ChiXDaily\'; % where all the .mat files are stored > > tmp = dir([rootDir '*.mat']); > > > > fnames = char({tmp.name}'); % the names of the .mat files which are in the form of > > 20101224_chix.mat > > > > clear tmp; > > > > dates = unique(cellstr(fnames(:,1:8))); %creates a list of dates from the filenames > > > > for i=1: length(dates) i.e. so for every date it will do the same thing > > > > load('C:\Users\Alex Eptas\Desktop\ChiXDaily\20080606_chix.mat', 'spreadMat'); % here is the problem - i need someway to make it do this; > > > > load('C:\Users\Alex Eptas\Desktop\ChiXDaily\date(i)_chix.mat', 'spreadMat'); > > > > then i will carry out the rest, i.e. > > > > AverageDailySpread = nanmean(spreadMat(:,1:244)); > > > > please could someone help me > > How about: > > fpath = 'C:\Users\Alex Eptas\Desktop\ChiXDaily\'; > > for i = 1:length(dates) > currentfile = fullfile(fpath, fnames(i)); > load(currentfile,'spreadMat'); > ... > end
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