Concatenate cell array of strings to a cell vector of strings
in [Matlab]
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From: Bruno Luong on 10 Jun 2010 10:02 "Ulrich" <millim1974(a)yahoo.com> wrote in message <huqpto$mtv$1(a)fred.mathworks.com>... > anyhow, thx dpd! > > It seams to me that Matlab is not able to perform that within one function call! C={'almo' 'st everything'; 'is poss', 'ible'; 'in sing' 'le line'} arrayfun(@(r) [C{r,:}], 1:size(C,1),'Unif',false) Bruno
From: Bruno Luong on 10 Jun 2010 10:30 "Bruno Luong" <b.luong(a)fogale.findmycountry> wrote in message <huqr8s$n6d$1(a)fred.mathworks.com>... > "Ulrich" <millim1974(a)yahoo.com> wrote in message <huqpto$mtv$1(a)fred.mathworks.com>... > > anyhow, thx dpd! > > > > It seams to me that Matlab is not able to perform that within one function call! > > C={'almo' 'st everything'; 'is poss', 'ible'; 'in sing' 'le line'} > arrayfun(@(r) [C{r,:}], 1:size(C,1),'Unif',false) Two lines: B = C'; mat2cell([B{:}],1,sum(cellfun('length',B))) Bruno
From: Oleg Komarov on 10 Jun 2010 11:09 "Bruno Luong" <b.luong(a)fogale.findmycountry> wrote in message <huqsu3$guj$1(a)fred.mathworks.com>... > "Bruno Luong" <b.luong(a)fogale.findmycountry> wrote in message <huqr8s$n6d$1(a)fred.mathworks.com>... > > "Ulrich" <millim1974(a)yahoo.com> wrote in message <huqpto$mtv$1(a)fred.mathworks.com>... > > > anyhow, thx dpd! > > > > > > It seams to me that Matlab is not able to perform that within one function call! > > > > C={'almo' 'st everything'; 'is poss', 'ible'; 'in sing' 'le line'} > > arrayfun(@(r) [C{r,:}], 1:size(C,1),'Unif',false) > > Two lines: > > B = C'; > mat2cell([B{:}],1,sum(cellfun('length',B))) > > Bruno Very elegant...but slow: >> C = repmat({'almo' 'st everything'; 'is poss', 'ible'; 'in sing' 'le line'},10000,1); t = NaN(2,1); tic B = C.'; B = mat2cell([B{:}],1,sum(cellfun('length',B))); t(1) = toc; tic D = cellstrhcat(C).'; t(2) = toc; isequalwithequalnans(B,D) ans = 1 t t = 1.87 0.13 Oleg
From: Bruno Luong on 10 Jun 2010 11:46 "Oleg Komarov" <oleg.komarovRemove.this(a)hotmail.it> wrote in message <huqv6h$m2t$1(a)fred.mathworks.com>... > > > > Two lines: > > > > B = C'; > > mat2cell([B{:}],1,sum(cellfun('length',B))) > > > > Bruno > > Very elegant...but slow: > The slow part is [B{:}], and Jan's submission can nicely fix that: % http://www.mathworks.com/matlabcentral/fileexchange/26077-cstr2string, C = repmat({'almo' 'st everything'; 'is poss', 'ible'; 'in sing' 'le line'},10000,1); tic B = mat2cell(CStr2String(C.'),1,sum(cellfun('length',C),2)); toc % about 0.1 sec Thanks Jan, Bruno
From: Oleg Komarov on 10 Jun 2010 12:15
"Bruno Luong" <b.luong(a)fogale.findmycountry> wrote in message <hur1bt$i5n$1(a)fred.mathworks.com>... > "Oleg Komarov" <oleg.komarovRemove.this(a)hotmail.it> wrote in message <huqv6h$m2t$1(a)fred.mathworks.com>... > > > > > > Two lines: > > > > > > B = C'; > > > mat2cell([B{:}],1,sum(cellfun('length',B))) > > > > > > Bruno > > > > Very elegant...but slow: > > > > The slow part is [B{:}], and Jan's submission can nicely fix that: > % http://www.mathworks.com/matlabcentral/fileexchange/26077-cstr2string, > > C = repmat({'almo' 'st everything'; 'is poss', 'ible'; 'in sing' 'le line'},10000,1); > > tic > B = mat2cell(CStr2String(C.'),1,sum(cellfun('length',C),2)); > toc % about 0.1 sec > > Thanks Jan, > > Bruno TMW should really implement Jan's solution. Oleg |