Fixed size output data in MATLAB - matlab

Question

I am trying to have a matrix which its elements doesn't have the same size .
Say the element_1 = 0.1234567 and the element_2 = 0.1 and I need the element_2 =0.1000000 so that both of them has the same size.
clc;clear all
a = rand(4,12);
COL_Names ={'This_is_Colu_No_1','This_is_Colu_No_2','This_is_Colu_No_3','This_is_Colu_No_4','This_is_Colu_No_5','This_is_Colu_No_6','This_is_Colu_No_7','This_is_Colu_No_8','This_is_Colu_No_9','This_is_Colu_No_10','This_is_Colu_No_11','This_is_Colu_No_12'};
rowNames = {'ROW1';'ROW2';'ROW3';'ROW4'};
T = array2table(a,'VariableNames',COL_Names,'RowNames',rowNames);
writetable(T,'Data.txt','Delimiter','\t','WriteRowNames',true);
type Data.txt ;
The OutPut is like this
Row This_is_Colu_No_1 This_is_Colu_No_2 This_is_Colu_No_3 This_is_Colu_No_4 This_is_Colu_No_5 This_is_Colu_No_6 This_is_Colu_No_7 This_is_Colu_No_8 This_is_Colu_No_9 This_is_Colu_No_10 This_is_Colu_No_11 This_is_Colu_No_12
ROW1 0.139740979774291 0.231035232035157 0.347778782863186 0.279682446566279 0.060995054119542 0.233212699943628 0.507599581908539 0.833087779293817 0.552819386888535 0.43251811668393 0.342580158122272 0.420574544492339
ROW2 0.00459708931895875 0.703626845695885 0.33064632159971 0.85782393462353 0 0.935097755896966 0.582441521353621 0.155241648807001 0.163717355897126 0.48985529896707 0.0134551766978835 0.810989133317225
ROW3 0.791254563282513 0.650747335567064 0.293769172888192 0.15110222627643 0.962791661993452 0.842147123142386 0.586462512126695 0.109349751268813 1 0.00525695361457879 0.700826048054212 0.989915984093474
ROW4 0.513993416249574 0.868158891144176 0.293769172888 0.552496163682282 0.301098948730568 0.779790450269442 0.420527994140777 0.523231514251179 0.0602548802340035 0.261436547849062 0.84923648156472 0.433189006269314

Answer 1

I think you need to do it manually using fprintf with formatSpec:
clc, clear, rng(3);
a = rand(4, 3);
colNames = {'This_is_Colu_No_9', 'This_is_Colu_No_10', 'This_is_Colu_No_11'};
rowNames = {'ROW98'; 'ROW99'; 'ROW100'; 'ROW101'};
formatSpecHead = '%-6s %-22s %-22s %-22s\n';
formatSpecRow = '%-6s %.20f %.20f %.20f\n';
fid = fopen('a.fwf', 'w');
fprintf(fid, formatSpecHead, 'Row', colNames{:}); % write header
for row = 1:size(a, 1)
fprintf(fid, formatSpecRow, rowNames{row}, a(row, :)); % write row
end
fclose(fid);
Then a.fwf looks like:
Row This_is_Colu_No_9 This_is_Colu_No_10 This_is_Colu_No_11
ROW98 0.55079790257457550418 0.89294695434765469777 0.05146720330082987793
ROW99 0.70814782261810482744 0.89629308893343806464 0.44080984365063646813
ROW100 0.29090473891294432729 0.12558531046383625274 0.02987621087856695556
ROW101 0.51082760519766301499 0.20724287813818675907 0.45683322439471107934