Change Y-Axis position to desired origin?

Hi,

could someone help me how I can change origin point of y axis to (0-20) point. In fact I want to shift Y axis to point (0-20) but I don't have any idea.

hold on
ax = gca;
ax.XAxisLocation = 'origin';
ax.YAxisLocation = 'origin';
origin = (0-20);
n= ["-240-260";"-220-240";"-200-220";"-180-200";"-160-180";"-140-160";"-120-140";"-100-120";"-80-100";"-60-80";"-40-60";"-20-40";"0-20";"0+20";"+20+40";"+40+60";"+60+80";"+80+100";"+100+120";"+120+140";"+140+160";"+160+180";"+180+200";"+200+220";"+220+240"];
y1 = [0,0,0,0,0,0,0,0,0,0,0,0.032258064516129,0.548387096774194,0.387096774193548,0.032258064516129,0,0,0,0,0,0,0,0,0,0];   
y2 = [0.032258065,0.064516129,0,0,0.064516129,0.064516129,0.032258065,0.064516129,0.129032258,0.225806452,0.161290323,0.096774194,0.032258065,0.032258065,0,0,0,0,0,0,0,0,0,0,0];      
y3 = [0,0,0,0.025641026,0.025641026,0.051282051,0.128205128,0,0,0.051282051,0,0.076923077,0.307692308,0.128205128,0,0.025641026,0,0.051282051,0.025641026,0,0.051282051,0.025641026,0.025641026,0,0];    
x = categorical(n, n);
plot(x,y1,'-ko', x,y2,'-ks',x,y3,'-k^','LineWidth',1,'MarkerEdgeColor','k','MarkerFaceColor','k','MarkerSize',7);
hold off

[madhan ravi]

What do you mean by 0-20? By the way format your code by pressing the code button so that it’s easy to read.

[Elnaz P]

Ok I did, just I want to shift Y axis from left on point 0-20, but two soultions (Ytick Label and Scale Up data), don't work yet.

[madhan ravi]

It would be better if you illustrate how it should look like using paint or something.

[Elnaz P]

Ok, I hope this will be more clear

[Sugar Daddy]

something like this

Answer 1

[Sugar Daddy]

Scale Up data

hold on
ax = gca;
ax.XAxisLocation = 'origin';
ax.YAxisLocation = 'origin';
origin = (0-20);
n= ["-240-260";"-220-240";"-200-220";"-180-200";"-160-180";"-140-160";"-120-140";"-100-120";"-80-100";"-60-80";"-40-60";"-20-40";"0-20";"0+20";"+20+40";"+40+60";"+60+80";"+80+100";"+100+120";"+120+140";"+140+160";"+160+180";"+180+200";"+200+220";"+220+240"];
y1 = [0,0,0,0,0,0,0,0,0,0,0,0.032258064516129,0.548387096774194,0.387096774193548,0.032258064516129,0,0,0,0,0,0,0,0,0,0];   
y2 = [0.032258065,0.064516129,0,0,0.064516129,0.064516129,0.032258065,0.064516129,0.129032258,0.225806452,0.161290323,0.096774194,0.032258065,0.032258065,0,0,0,0,0,0,0,0,0,0,0];      
y3 = [0,0,0,0.025641026,0.025641026,0.051282051,0.128205128,0,0,0.051282051,0,0.076923077,0.307692308,0.128205128,0,0.025641026,0,0.051282051,0.025641026,0,0.051282051,0.025641026,0.025641026,0,0];    
x = categorical(n, n);
mv = max(max([y1;y2;y3]));
y1 = y1/mv*20;
y2 = y2/mv*20;
y3 = y3/mv*20;
plot(x,y1,'-ko', x,y2,'-ks',x,y3,'-k^','LineWidth',1,'MarkerEdgeColor','k','MarkerFaceColor','k','MarkerSize',7);

Change Ytick Label

hold on
ax = gca;
ax.XAxisLocation = 'origin';
ax.YAxisLocation = 'origin';
origin = (0-20);
n= ["-240-260";"-220-240";"-200-220";"-180-200";"-160-180";"-140-160";"-120-140";"-100-120";"-80-100";"-60-80";"-40-60";"-20-40";"0-20";"0+20";"+20+40";"+40+60";"+60+80";"+80+100";"+100+120";"+120+140";"+140+160";"+160+180";"+180+200";"+200+220";"+220+240"];
y1 = [0,0,0,0,0,0,0,0,0,0,0,0.032258064516129,0.548387096774194,0.387096774193548,0.032258064516129,0,0,0,0,0,0,0,0,0,0];   
y2 = [0.032258065,0.064516129,0,0,0.064516129,0.064516129,0.032258065,0.064516129,0.129032258,0.225806452,0.161290323,0.096774194,0.032258065,0.032258065,0,0,0,0,0,0,0,0,0,0,0];      
y3 = [0,0,0,0.025641026,0.025641026,0.051282051,0.128205128,0,0,0.051282051,0,0.076923077,0.307692308,0.128205128,0,0.025641026,0,0.051282051,0.025641026,0,0.051282051,0.025641026,0.025641026,0,0];    
x = categorical(n, n);
mv = max(max([y1;y2;y3]));
plot(x,y1,'-ko', x,y2,'-ks',x,y3,'-k^','LineWidth',1,'MarkerEdgeColor','k','MarkerFaceColor','k','MarkerSize',7);
ax.YTickLabel= string(linspace(0,20,length(ax.YTickLabel)));

[madhan ravi]

+1, Ah ok now it’s clear 👌

[Elnaz P]

Yes I gonna shift Y axis from left on point 0-20, but by change Ytick Label it doesn't work yet

Answer 2

[Steven Lord]

I don't believe the axis ruler that is used when you plot using categorical data supports moving the axis location. In the situation you described we humans can see a reasonable definition for what 'origin' should probably mean (the bin whose label includes 0) but MATLAB can't see that (why is the bin whose name starts with the character '0' special?) In addition, if I were to try to place the axis at the 'origin' for the following plot where should the axis be placed and why should it be placed there?

c = ["cat", "broccoli", "sapphire"];
x = categorical(c, c);
h = plot(x, [4 7 1]);
ax = ancestor(h, 'axes');
ax.YAxisLocation = "origin";

[Elnaz P]

If I had ability to move the axis, it was more easy to analyze the data, in this plot data between 0 to -20 is origin. After zero, positive starts and before that negative. However thanks for your replay

[Steven Lord]

You can't move the axis, but you could put a dividing line.

n= ["-240-260";"-220-240";"-200-220";"-180-200";"-160-180";"-140-160";"-120-140"; ...
    "-100-120";"-80-100";"-60-80";"-40-60";"-20- 40";"0-20";"0+20";"+20+40";...
    "+40+60";"+60+80";"+80+100";"+100+120";"+120+140";"+140+160";"+160+180";...
    "+180+200";"+200+220";"+220+240"];
y1 = [0,0,0,0,0,0,0,0,0,0,0,0.04,0.32,0.56,0.08,0,0,0,0,0,0,0,0,0,0];
y2 = [0,0.05,0.05,0.05,0,0.1,0,0,0.2,0.3,0.1,0.1,0.05,0,0,0,0,0,0,0,0,0,0,0,0];
x=categorical(n, n);
plot(x,y1,'r--o', x,y2,'k--o');

% Category 13 in x is "0-20"
xline(x(13))