How and when to use sprintf disp ?....

Hi guys, I m italian (excuse me for my english) and I have a question about sprintf (disp,..):

My code is :

for k=1:1:Matrice_Gruppi(1, end)      
    c1={nomi_famiglie};      
    c2={Matrice_Gruppi(5, k)};      
    sprintf('\n %s paga %s euro.',c1{1},c2{1});       
end

I simply would

1. Insert with keybord a string and to save it into nomi_famiglie then
2. To print values of nomi_famiglie and Matrice_Gruppi on command window (inizially, then I would create a interface).

I see the error:

Undefined function or variable 'sprinf'.

Could you help me please?

Thanks and bye

[Stephen23]

for k=1:1:Matrice_Gruppi(1, end)      
    c1={nomi_famiglie};      
    c2={Matrice_Gruppi(5, k)};      
    sprintf('\n %s paga %s euro.',c1{1},c2{1});       
end

What is the point in making c1 and c2 cell arrays, when on the very next line you take the data out of the cells? The cell arrays are totally superfluous, and only serve to confuse.

Also, what does this do?:

for k=1:1:Matrice_Gruppi(1,end)

Does the first row of Matrice_Gruppi contain an enumeration?

[Luca]

>> Matrice_Gruppi

Matrice_Gruppi =

    1.0000
    5.0000
    4.0000
  393.7000
  520.2000

[Stephen23]

@Luca Filippone: I think you should be using

for k = 1:numel(Matrice_Gruppi)

[Luca]

All works, thanks

Answer 1

[Image Analyst]

There is no function sprinf(). Use sprintf(), with a "t", instead.

Or better yet, don't use cell arrays:

for k=1:1:Matrice_Gruppi(1, end)      
    myStrings{k} = sprintf('%s paga, %f euros.\n',...
        nomi_famiglie, Matrice_Gruppi(5, k));
end  
celldisp(myStrings);

assuming Matrice_Gruppi is an array of doubles, not strings like you implied by using %s.

[Luca]

ok "sprintf"... :)

but I have..

Error using sprintf Function is not defined for 'cell' inputs.

[Stephen23]

If Matrice_Gruppi is a cell array then use the correct indexing and format string:

 for k=1:1:Matrice_Gruppi(1, end)      
     myStrings{k} = sprintf('%s paga, %s euros.\n', nomi_famiglie, Matrice_Gruppi{5,k});
  end

You did not tell us what data class Matrice_Gruppi, not what it contains, so how are we supposed to tell you how to access its data correctly?

[Stephen23]

Luca Filippone's "Answer" moved here:

..and then.. why with new=input('\n\nInserisci nome famiglia '); I can't type a string?

    new=input('\n\nInserisci nome famiglia   ')

Inserisci nome famiglia pippo Error using input Undefined function or variable 'pippo'.

[Stephen23]

@Luca Filippone: because you forgot to read the input documentation, and learn that you need to use the 's' option for strings:

txt = 'Inserisci nome famiglia: ';
str = input(txt,'s')

[Image Analyst]

You showed in your comment above that Matrice_Gruppi is a 5 by 1 array. And Matrice_Gruppi(1,end) = 520.2000. So in your sprintf when you're trying to access Matrice_Gruppi(5, k) when k = 1,2,3,4,5,.....520, will fail because there is no columns beyond 1.