i am getting answer as an empty matrix..,why.?

 function t_A2_5()
s_names = {'nimisha' 'pooja' 'leela' 'jk'}
s_marks = [23 56 78 89]
n1 = numel(s_marks)
in_st.name = [];
in_st.marks = [];
for c1 = 1: n1
A.name = s_names {c1 };
A.marks = s_marks (c1 );
in_st(c1) = A;
clear A;
end;
clear c1;
c_name = 'pooja'
ind = Get_Data(s_names,c_name);
c_data = s_marks(ind)
disp(c_data)
return;

 function ind = Get_Data(s_names , c_name)
ind=find(ismember(s_names,c_name))

In this i want such that whatever i give as c_name = pooja at 17th line, then it should give corresponding answer., it is compulsory for me to make Get_Data function.. Why this erro.?

Answer 1

[Orion]

For what I understand.

you have a cell list and a 'matching' array

s_names = {'nimisha' 'pooja' 'leela' 'jk'}
s_marks = [23 56 78 89]

If you ask for 'pooja', you just want to find the corresponding element in s_names, then the corresponding value in s_marks ? your code already did it. and there is no empty matrix !

In a simplier way, you should code more like this :

s_names = {'nimisha';'pooja';'leela';'jk'};
s_marks = [23 56 78 89];
c_name = 'pooja';
c_data = s_marks(strcmp(s_names,c_name));
disp(c_data)
    56

[Nimisha]

But it is compulsory for me to make atleast one function

 Get_Data

in program. in above my said program just i have to make Get_Data function

[Orion]

then do a function

function c_data = Get_Data(s_names,s_marks,c_name)
c_data = s_marks(strcmp(s_names,c_name));

and use it in the main

s_names = {'nimisha';'pooja';'leela';'jk'};
s_marks = [23 56 78 89];
c_name = 'pooja';

c_data = Get_Data(s_names,s_marks,c_name);

[Nimisha]

 function t_A2_5()
s_names = {'nimisha'; 'pooja'; 'leela'; 'jk'}
s_marks = [23 56 78 89]
n1 = numel(s_marks);
in_st.name = [];
in_st.marks = [];
for c1 = 1: n1
A.name = s_names {c1 };
A.marks = s_marks (c1 );
in_st(c1) = A;
clear A;
end;
clear c1;
c_name = 'pooja'
c_data = Get_Data(s_names,s_marks,c_name)
disp(c_data)
return;

And i used following function

 function c_data = Get_Data(s_names,s_marks,c_name)
c_data = s_marks(strcmp(s_names,c_name));

This gives output as

c_data =

   Empty matrix: 1-by-0

i think its wrong.. answer should be 56

[Orion]

I just copy/paste your code and run it without modification and it gives

c_data =

      56

So it works on my machine, I guess you have modify something on your side.

[Nimisha]

i checked..

See first line..

i made two codes,

one with

 function t_A2_5()

as a starting.

When i use it i got answer,

 c_data =

   Empty matrix: 1-by-0

when i run code after removing it, i am getting correct answer

 56

Is it anyhow possible to get correct answer

 56

with using

 function t_A2_5()

this as a starting.

[Orion]

I still don't get your "empty problem".

I attached the 2 Mfiles, which works for me.

just run t_A2_5 and it should work

[Nimisha]

I dont know why,

But this your given files Worked for me.

 THANK YOU so much :)