its not taking the values of y when y value is ranging from 0.25 to 0.45 with an interval of 0.05,but it is able to take the value when y value is constant. and its coming in some matrix but with constant values.

Y1 =    7.7054
Y2 = 9.6584   
I(3)= -0.0043
I(4)=0.4141

n=4 ;
m=2; 
y=0.25:0.05:0.45;

      for j=1:m
          for i=1:n
              if (j==1)
          ud(i+1,1)=y;
          taub(i+1,1)=y;
          ud(i+1,2)=(I(3)*exp(Y2*y)+I(4)*exp(-Y2*y)+k2)^0.5;
          taub(i+1,2)=(f*ro*ud(i+1,2)^2)/8;
              end
      end
      end
  ud
  taub
  plot(ud(i,1),ud(i,2))

sir here y will be my first column and ud will be my second column,bt ud is dependent on y,y is varying from 0.25 to 0.45 by having an interval of 0.05. here i just want to change the value of y in each iteration.

[ES]

Shouldn't you be using y(i) instead of y alone in the lines

ud(i+1,1)=y;
taub(i+1,1)=y;
ud(i+1,2)=(I(3)*exp(Y2*y)+I(4)*exp(-Y2*y)+k2)^0.5;

Also what is k2?

[ellora]

k2 =

    0.3292
but I am unable to plot the graph between y and ud,can you please find out the way so that it can be done.

[Image Analyst]

But we don't know if y should really be y(j) or y(i). y has 5 elements, not 2 or 4 like m and n.

[ellora]

y is y(i),plz try to find the table containg 1st column as y and 2nd column of ud values.if it is possible then plz send it to my mail. n thx for replying me

[Image Analyst]

Is "the table" what you call "taub"? And by "find" you really mean "assign"? Or do you really mean "find" as in search for, or identify the location of?

[ellora]

table does nt mean taub,and i said 'find' that means i want to ve my data in a tabular format. that too the table should contain 2 columns,one for the value of y and the 2nd column for ud.there is nothing related to taub(its a different variable).

[ellora]

it worked.thx

Answer 1

[Jos (10584)]

In your assignment

ud(i+1,1)=y;

the left hand expression "ud(i+1,1)" is a single element, whereas the right hand expression "y" is a list of numbers. This will not work.

What should ud look like when i equals 1?

[ellora]

yeah i got it, i used ud(i+1,1)=y(i),then it worked.thx