Interpolation from a table

Hello, I have put in my script a table like this one to find the value K0 :

i have both value e/b, for select column, and y/b for the rows.

As you can immagine i need a double interpolation to find my value of K0. If we put e/b = 0.23 (red) and y/b = 0.60 (blue) how can i select the values insite the intersection between the red columns and the blue rows for the final interpolation?

Hope is all clear

Ty for your answers

Answer 1

[Star Strider]

The interp2 function is one option —

eb = [0  0.25];
yb = [0.5; 0.75];
K0 = [1.0009  1.3767;  0.9948  1.5583];

Check = [NaN eb; yb K0]

Check = 3×3

NaN 0 0.2500 0.5000 1.0009 1.3767 0.7500 0.9948 1.5583

ebq = 0.1;                                      % 'e/b' Value To Interpolate
ybq = 0.6;                                      % 'y/b' Value To Interpolate
K0q = interp2(yb, eb, K0, ybq, ebq)             % Interpolated 'K0' Value

K0q = 1.1788

figure
surfc(yb, eb, K0, 'FaceAlpha',0.9)
hold on
stem3(ybq, ebq, K0q, 'r', 'filled')
hold off
colormap(turbo)
grid on
xlabel('y/b')
ylabel('e/b')
zlabel('K0 (\theta = 0.20)')

.