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Change Y-Axis position to desired origin?

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Elnaz P
Elnaz P 2020-7-9
评论： Steven Lord 2020-7-10
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 个评论
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回答（2 个）

Sugar Daddy
Sugar Daddy 2020-7-9
编辑：Sugar Daddy 2020-7-9

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 个评论
madhan ravi
madhan ravi 2020-7-9
编辑：madhan ravi 2020-7-9
+1, Ah ok now it’s clear 👌
Elnaz P
Elnaz P 2020-7-9
编辑：Elnaz P 2020-7-9
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
Steven Lord 2020-7-9
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 个评论
Elnaz P
Elnaz P 2020-7-9
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
Steven Lord 2020-7-10
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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