create/prelocate a cell
in [Matlab]
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From: Wendy on 5 Feb 2010 18:20 I want to create a nested cell with 3 levels, ie. A{}{}{}. I want to prelocate this cell, as I am going to use it as a counting tool using the code below: OUTPUT{1,path_i}{1,Ka_i}{1,class_i} = OUTPUT{1,path_i}{1,Ka_i}{1,class_i}+1; I need to initialize the cell. I tried OUTPUT=zeros{1:5}{1:4}{1:10}, but it does not work. Does anyone know how to initialize a nested cell? Or is there any suggestion for counting to avoid the use of existing value in a cell element? Thank you very much, Wendy
From: ade77 on 5 Feb 2010 19:51 "Wendy " <wlq121(a)gmail.com> wrote in message <hki93k$7s6$1(a)fred.mathworks.com>... > I want to create a nested cell with 3 levels, ie. A{}{}{}. I want to prelocate this cell, as I am going to use it as a counting tool using the code below: > > OUTPUT{1,path_i}{1,Ka_i}{1,class_i} = OUTPUT{1,path_i}{1,Ka_i}{1,class_i}+1; > > I need to initialize the cell. I tried OUTPUT=zeros{1:5}{1:4}{1:10}, but it does not work. Does anyone know how to initialize a nested cell? Or is there any suggestion for counting to avoid the use of existing value in a cell element? > > Thank you very much, > Wendy doc cell
From: James Tursa on 5 Feb 2010 22:00 "Wendy " <wlq121(a)gmail.com> wrote in message <hki93k$7s6$1(a)fred.mathworks.com>... > I want to create a nested cell with 3 levels, ie. A{}{}{}. I want to prelocate this cell, as I am going to use it as a counting tool using the code below: > > OUTPUT{1,path_i}{1,Ka_i}{1,class_i} = OUTPUT{1,path_i}{1,Ka_i}{1,class_i}+1; > > I need to initialize the cell. I tried OUTPUT=zeros{1:5}{1:4}{1:10}, but it does not work. Does anyone know how to initialize a nested cell? Or is there any suggestion for counting to avoid the use of existing value in a cell element? > > Thank you very much, > Wendy Why are you trying to use a cell as opposed to a multi-dimensional array? e.g., why not OUTPUT = zeros(5,4,10); : OUTPUT(path_i,Ka_i,class_i) = OUTPUT(path_i,Ka_i,class_i)+1; James Tursa
From: Jan Simon on 6 Feb 2010 12:13
Dear Wendy! > I want to create a nested cell with 3 levels, ie. A{}{}{}. I want to prelocate this cell, as I am going to use it as a counting tool using the code below: > > OUTPUT{1,path_i}{1,Ka_i}{1,class_i} = OUTPUT{1,path_i}{1,Ka_i}{1,class_i}+1; > OUTPUT=zeros{1:5}{1:4}{1:10} > but it does not work This is not surprising, because it is obviously no valid Matlab syntax. Please look at: help zeros You cannot pre-allocate nested cells in a single step. You have to do this for each level individually: C3 = cell(1, class_n); C3(:) = {1}; % fill in your wanted data here! C2 = cell(1, Ka_n); C2(:) = {C3}; C1 = cell(1, path_n); C1(:) = {C2}; Nevertheless, I assume that there is a better method to organize your data that 3 nested cells. Kind regards, Jan |