How to create a vertical offset line

Please urgently if possible I need to solve the following problem

An equation give me graph of some layers at depths z1, z2, z3, and z4 (see attached figure), and I need to break them down (vertical offset) with a constant = z2-z1= z3-z2=z4-z3 (if satisfying this condition), in addition to drowing a vertical line (red line in satisfied location)

Answer 1

[Star Strider]

Try something like this —

zv = sort(rand(4,1))                                                                % Define 'z' Values

zv = 4×1

0.0231 0.1089 0.3493 0.7581

const = rand                                                                        % Define Constant Offset

const = 0.0537

figure
plot([0 1], zv*[1 1], '-k', 'LineWidth',1.5)
hold on
plot([1 2], (zv-const)*[1 1], '-k', 'LineWidth',1.5)
hold off
xline(1, '-r', 'LineWidth',2)
linelabels = compose('z%d',numel(zv):-1:1);
text(zeros(size(zv)), zv, linelabels, 'Horiz','left', 'Vert','bottom')
text(zeros(size(zv))+2, zv-const, linelabels, 'Horiz','right', 'Vert','bottom')
set(gca, 'Visible','off')                                                           % Hide Axes (Optional)

Define the the ‘zv’ vector as a column vector of increasing values, and define the constant (‘const’) as a single scalar.

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[Moustafa Abedel Fattah]

Thank you Star Strider

it is working but my Matlab version R2014b (old version) so, the command xline is not defined

[Star Strider]

As always, my pleasure!

Instead of xline then, try this slightly edited version —

zv = sort(rand(4,1))                                                                % Define 'z' Values

zv = 4×1

0.1188 0.4990 0.6504 0.9499

const = rand                                                                        % Define Constant Offset

const = 0.1647

figure
plot([0 1], zv*[1 1], '-k', 'LineWidth',1.5)
hold on
plot([1 2], (zv-const)*[1 1], '-k', 'LineWidth',1.5)
plot([1 1], ylim, '-r', 'LineWidth',2)                                              % Work-Around For 'xline'
hold off
linelabels = compose('z%d',numel(zv):-1:1);
text(zeros(size(zv)), zv, linelabels, 'Horiz','left', 'Vert','bottom')
text(zeros(size(zv))+2, zv-const, linelabels, 'Horiz','right', 'Vert','bottom')
set(gca, 'Visible','off')                                                           % Hide Axes (Optional)

Everything else should work as written. If not, let me know and I will do what I can to solve whatever problems remain.

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[Moustafa Abedel Fattah]

Thank you Star Strider for your always quick response ... well done

[Star Strider]

As always, my pleasure!

Answer 2

[Image Analyst]

Try xline and yline. You can use the 'LineWidth' and 'Color' option to set up the line thickness and color.

[Moustafa Abedel Fattah]

What about the vetical offset?

[Image Analyst]

If the line is not going all the way across the graph, you can use line or plot() to specify the endpoints at whatever x and y values you want, so you'll get line segments.