Creating an area graph with known variables on the x and y-axis

I am trying to create an elevation graph using contour lines and a straight line cutting through the contour lines. Contour lines need an x,y,z coordinate points. I want to create an elevation graph with the x values from the line (representing distance on the x-axis), and the z values (representing elevation on the y-axis). I want it to be a regular graph with a solid line representing the values and no incremented straight lines.

The 'xvalues' of the line is an array. I tried making it a column array by doing xvalues' or xvalues = (0.0000:0.1000:3.0000)';to a variable, yet the variable wouldn't create (??? May have to close everything and open matlab again).

Xvalues on the x-axis as the distance and I have the z values on the y-axis. 'corresponding_z" is a column array. I did "(1:size(xvalues), : )" to get the rows in that 1 column that correspond to the size of the xvalues array. For example, xvalues is a row-array with 31 elements. I want the same corresponding z values within the column-array "corresponding_z". I don't really know if this is correct.

plot(xvalues,corresponding_z(1:size(xvalues),:))

When I call plot, I get an empty graph.

xvalues = (0.0000:0.1000:3.0000);

if ismembertol(x,xvalues)

xln = [0.0000 3.0000]; %from before

xvalues = (0.0000:0.1000:3.0000); %xvalues of straight line with 0.1 increment

%rows and columns where the xvalues of the line are the values in x(contour lines)

idx = find(ismembertol(x,xvalues));

corresponding_y = y(idx);

corresponding_z = z(idx);

corresponding_x = x(idx);

hold on

figure

plot(xvalues,corresponding_z(1:size(xvalues),:))

xlabel('Distance')

ylabel('Elevation')

[Naomi Amuzie]

Hi, I will have to modify this question, give me just a second!