Finding Values in a file

Hello, I have a file named as " model_data".

In the first column, there are different values from 0 to 0.1216. I want to develop a program in such a way that if a user enters a value of 0.1 The program should tell the user in which row/ or in between which rows the value lies of the first column.

[krishna teja]

this seems like a homework question

instead, you could try out some code and ask specific places whre you find errors...

[Chris Dan]

I tried this line

X = find (0.0751 == model_data( :,1));

it gives me the answer 3, but when I try 0.1, I donot get any answer, where as I should be getting 3 and 4, because in between them 0.1 lies

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F

The == operator is a bit-for-bit exact comparison . Your table entry probably only displays as 0.0751 and is probably not 0.075100000000000000088817841970012523233890533447265625 exactly like a hard-coded 0.0751 is.

Answer 1

[Chris Dan]

X = find (0.0751 > model_data( :,1));

Y = find (0.0751 <model_data( :,1));

I kind of got the answer, we get two variables and then we can choose their data values, which we want, like

Y(1,1),Y(2,1), Y(3,1)

X(1,1),X(2,1), X(3,1)

and that will be our answers