how can I plot an increase and decrease in tempearture as x-axes (i.e. from 25 to 700, 700 to 500 all on x-axes), agains different y-axes

load A
plot(A.T_bred,A.O2);hold on;
plot(A.T_bred,A.CO2);hold off;

Answer 1

[Star Strider]

The tiledlayout function can do this in a relatively straightforward manner.

LD = load(websave('A','https://www.mathworks.com/matlabcentral/answers/uploaded_files/1262340/A.mat'));
A = LD.A

A = 1500×4 table
    CO     CO2        O2      T_bred
    __    ______    ______    ______

    0     3.8976     20.96      25  
    0     3.8316    20.952      25  
    0     3.8046    20.928      25  
    0     3.7943    20.919      25  
    0     3.7947    20.914      25  
    0     3.7846     20.91      25  
    0     3.7678    20.906      25  
    0     3.7533    20.902      25  
    0     3.7325      20.9      25  
    0     3.7083    20.899      25  
    0     3.6821    20.891      25  
    0     3.6572    20.877      25  
    0     3.6352    20.854      25  
    0     3.6148    20.829      25  
    0     3.5977    20.806      25  
    0     3.5807    20.783      25  

figure
tiledlayout(1,2, 'TileSpacing','none')                  % Define Layout With No Spaces Between Tiles
nexttile
plot(A.T_bred,A.O2)
xlim([25 700])
nexttile
plot(A.T_bred,A.CO2)
xlim([500 700])
set(gca, 'XDir','reverse')                              % Reverse X-Axis Direction In Second Tile Plot

I am not certain what you want to do, however this should get you started.

EDIT — (13 Jan 2023 at 16:54)

Sorting ‘T_bred’ and plotting against it —

As = sortrows(A,4)                                          % Sort On 'T_bred'

As = 1500×4 table
    CO     CO2        O2      T_bred
    __    ______    ______    ______

    0     3.8976     20.96      25  
    0     3.8316    20.952      25  
    0     3.8046    20.928      25  
    0     3.7943    20.919      25  
    0     3.7947    20.914      25  
    0     3.7846     20.91      25  
    0     3.7678    20.906      25  
    0     3.7533    20.902      25  
    0     3.7325      20.9      25  
    0     3.7083    20.899      25  
    0     3.6821    20.891      25  
    0     3.6572    20.877      25  
    0     3.6352    20.854      25  
    0     3.6148    20.829      25  
    0     3.5977    20.806      25  
    0     3.5807    20.783      25  

figure
tiledlayout(1,2, 'TileSpacing','none')                  % Define Layout With No Spaces Between Tiles
nexttile
plot(As.T_bred,As.O2)
xlim([25 700])
nexttile
plot(As.T_bred,As.CO2)
xlim([500 700])
set(gca, 'XDir','reverse')                              % Reverse X-Axis Direction In Second Tile Plot

[T_bredU,idx] = unique(A.T_bred, 'sort');               % Unique Sorted Values Of 'T_bred' & Indices Of First Instances 
Au = A(idx,:);                                          % Sort On 'idx'

figure
tiledlayout(1,2, 'TileSpacing','none')                  % Define Layout With No Spaces Between Tiles
nexttile
plot(Au.T_bred,Au.O2)
xlim([25 700])
nexttile
plot(Au.T_bred,Au.CO2)
xlim([500 700])
set(gca, 'XDir','reverse')                              % Reverse X-Axis Direction In Second Tile Plot

This plots and as fuctions of ‘T_bred’ sorted by ‘T_bred’. My code is otherwise unchanged.

Where do you want to go from here (since I do not understand what you want to do)?

[T_bredMax,maxidx] = max(A.T_bred)

T_bredMax = 648

maxidx = 870

idx1 = 1:maxidx;
idx2 = maxidx:size(A,1);

figure
tiledlayout(1,2, 'TileSpacing','none')                  % Define Layout With No Spaces Between Tiles
nexttile
plot(A.T_bred(idx1),A.O2(idx1))
hold on
plot(A.T_bred(idx1),A.CO2(idx1))
hold off
xlim([25 650])
ylim([0 45])
nexttile
plot(A.T_bred(idx2),A.O2(idx2))
hold on
plot(A.T_bred(idx2),A.CO2(idx2))
hold off
xlim([500 650])
set(gca, 'XDir','reverse')                              % Reverse X-Axis Direction In Second Tile Plot

figure
tiledlayout(1,2, 'TileSpacing','none')                  % Define Layout With No Spaces Between Tiles
nexttile
plot(A.T_bred(idx1),A.O2(idx1))
hold on
plot(A.T_bred(idx1),A.CO2(idx1))
hold off
xlim([25 650])
ylim([0 45])
nexttile
plot(A.T_bred(idx2),A.O2(idx2))
hold on
plot(A.T_bred(idx2),A.CO2(idx2))
xline(500, '-k')
hold off
xlim([500 650])
Axr = gca;
Axr.XDir = 'reverse';                              % Reverse X-Axis Direction In Second Tile Plot
Axr.YAxis.Visible = 'off';
Axr.YTick = [];

This looks like it could approach what you want. I cannot turn off the y-axis ticks on the right plot (in the centre here), even thougu that should be possible. I am not certain how to deal with the x-axis tick values or labels, so I left them as they are.

.

Answer 2

[Kevin Holly]

Did you want something like this?

load A

yyaxis left
plot(A.T_bred,A.O2);
yyaxis right
plot(A.T_bred,A.CO2);

[Level 2]

@Kevin Holly,@Star Strider Thank you for your answers. But from the example below, I want the 'T-bred' on the y-axes to replace the 'Row' on the x-axes. x-axes to increase and decrease according to the variable data. i.e. varing x-axes. But the y-xes to remain straight not twisted lines.

load A;
figure;stackedplot(A);

Answer 3

[Level 2]

@Star Strider Thank you. I just want to combine this two graphs into one graph, It is the same x-axes of T-bred

load A
figure;plot(A.T_bred(1:872),A.O2(1:872),'DisplayName','O2');hold on;plot(A.T_bred(1:872),A.CO2(1:872),'DisplayName','CO2');hold off;legend

figure;plot(A.T_bred(872:end),A.O2(872:end),'DisplayName','O2');hold on;plot(A.T_bred(872:end),A.CO2(872:end),'DisplayName','CO2');hold off;legend