# Change Y-Axis position to desired origin?

8 vues (au cours des 30 derniers jours)
Elnaz P le 9 Juil 2020
Commenté : Steven Lord le 10 Juil 2020
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
##### 5 commentairesAfficher 3 commentaires plus anciensMasquer 3 commentaires plus anciens
Elnaz P le 9 Juil 2020
Ok, I hope this will be more clear
Sugar Daddy le 10 Juil 2020
something like this

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### Réponses (2)

Sugar Daddy le 9 Juil 2020
Modifié(e) : Sugar Daddy le 9 Juil 2020

### 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)));
##### 2 commentairesAfficher AucuneMasquer Aucune
madhan ravi le 9 Juil 2020
Modifié(e) : madhan ravi le 9 Juil 2020
+1, Ah ok now it’s clear 👌
Elnaz P le 9 Juil 2020
Modifié(e) : Elnaz P le 9 Juil 2020
Yes I gonna shift Y axis from left on point 0-20, but by change Ytick Label it doesn't work yet

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Steven Lord le 9 Juil 2020
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";
##### 2 commentairesAfficher AucuneMasquer Aucune
Elnaz P le 9 Juil 2020
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 le 10 Juil 2020
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))

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