How to concat string i

Question

for i 1 N    f i     f  i  end   gives an error in MatLab  What s the correct syntax to initialize an array with N strings of the pattern fi   It seems like even this is not working   for i 1 4   f i     f   end

User · Answer

Try the following   for i   1 4     result   strcat  f  int2str i    end   If you use this for naming several files that your code generates  you are able to concatenate more parts to the name  For example  with the extension at the end and address at the beginning   filename   strcat  c      name  int2str i    png

User · Answer

Let me add another solution    gt  gt  N   5   gt  gt  f   cellstr num2str  1 N     f d    f         f1       f2       f3       f4       f5    If N is more than two digits long   gt   10   you will start getting extra spaces  Add a call to strtrim f  to get rid of them     As a bonus  there is an undocumented built-in function sprintfc which nicely returns a cell arrays of strings    gt  gt  N   10   gt  gt  f   sprintfc  f d   1 N  f         f1      f2      f3      f4      f5      f6      f7      f8      f9      f10

User · Answer

Using sprintf was already proposed by ldueck in a comment  but I think this is worth being an answer   f i    sprintf  f d   i     This is in my opinion the most readable solution and also gives some nice flexibility  i e  when you want to round a float value  use something like   2f

User · Answer

according to this it looks like you have to set  N  before trying to use it and it looks like it needs to be an int not string  Don t know much bout MatLab but just what i gathered from that site  hope it helps

User · Answer

For versions prior to R2014a     One easy non-loop approach would be to use genvarname to create a cell array of strings    gt  gt  N   5   gt  gt  f   genvarname repmat   f    1  N    f    f          f1      f2      f3      f4      f5    For newer versions     The function genvarname has been deprecated  so matlab lang makeUniqueStrings can be used instead in the following way to get the same output    gt  gt  N   5   gt  gt  f   strrep matlab lang makeUniqueStrings repmat   f    1  N    f               f      1  5 cell array        f1      f2      f3      f4      f5

User · Answer

You can concatenate strings using strcat   If you plan on concatenating numbers as strings  you must first use num2str to convert the numbers to strings   Also  strings can t be stored in a vector or matrix  so f must be defined as a cell array  and must be indexed using   and    instead of normal round brackets    f   cell N  1   for i 1 N    f i    strcat  f   num2str i    end

[string] How to concat string + i?

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