how Slope of a line?

I have plotted data and i want to obtain the gradient of the different sections of the line plot.How do i obtain the slope for the similar sections for

t=[ 1 2 3 4 5 6]; 
v=[10 25 30 40 45 50];
plot(t,v)

Answer 1

[Azzi Abdelmalek]

diff(v)./diff(t)

[Masilani]

i want to obtain the slope by separating it 2 sections.Instead of obtaining 4 answers,just limit them to 2

[Image Analyst]

What sections do you want? You can extract sections like this:

section1 = v(index1:index2);

where you, of course, specify the starting and ending indices of the section you want to extract.