MATLAB: How to shade area under 2D- curve into a certain x values

Question

Hi everyone! I need some help to fill my graphic! I researched for many examples, but any of them is working.

I wanted to fill the area bellow the curve into the X-value of 35 with one colour and bellow this level with another colour. I tried the functions fill and area, none of them worked.

The data is also attached to the question!

Thank you in advance!

clc

clear all

%% Set the Thresholds

highTOC = 35;

medTOC = 64;

Data = readtable('cl024_12._lab.txt');

L = Data.L;

Depth = Data.Depth;

%% correct the L* field measurements according to the calibration

Lmin_o = 0;%old minimum

Lmax_o = 100;%old maximum

Lmin_n = 26.6;%new minimum

Lmax_n = 99.6;%new maximum

NEWL = ((Lmax_n – Lmin_n)/(Lmax_o – Lmin_o)*L)+Lmin_n;

L_real = smooth(NEWL,15);

%%

figure(1)

plot(L_real,Depth)

baseval = 35;

hold on

area(min(L_real,baseval),Depth,baseval)

xlabel('L*','FontSize',12,'FontWeight','bold')

hold off

axis ij

Answer 1

Maybe something is wrong with importing? Try importdata

Data = importdata('cl024_12._lab.txt');
L = Data.data(:,5);
Depth = Data.data(:,1);