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How to insert text in a matrix - If function

Asked by Pierre Lonfat on 19 Apr 2017
Latest activity Commented on by Pierre Lonfat on 20 Apr 2017
Dear All, In the following code I would like to insert 'good news', 'bad news', 'no news' instead of 1, 2, 3 in the "Announcement" matrix.
No idea how to insert text in a matrix (20X28 in this case) !
Many thanks in advance !
Pierre

  1 Comment

Numeric matrices contain numeric data only.
You could:
  • store the index in the numeric array, or
  • use another kind of array, e.g. a cell array, table, etc.
But it is not possible to put a string (1xN character vector) into one element of a numeric matrix.

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2 Answers

Answer by Geoff Hayes
on 19 Apr 2017
 Accepted Answer

Pierre - since you are inserting strings of different lengths, your Announcements array will need to be come a cell array
Announcements = cell(N,28);
You will updates it simply as
Announcements{j,i} = 'good news';
etc.
Though you may want to keep your previous implementation and just manage an array of values between 1-3 and then (when you need to display your message) just access a map that converts the number to a string
mapIdToString = {'good news'; 'bad news' ; 'no news'};
The equivalent to the 1 (id) would then be
mapIdToString(1)

  1 Comment

Thank you from the bottom of my heart !

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Answer by Andrei Bobrov
on 19 Apr 2017

D is Divident
F is Forecasted_DPS
A = {'good news','bad news','no news'};
ii = (D >= 1.03*F) + (D <= .97*F)*2;
ii(ii == 0) = 3;
Announcements = A(ii);

  1 Comment

This solution works as well ! Thanks !

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