# Counting lines on the y axis

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Eliot Sperling on 7 Feb 2018
Commented: Jan on 16 Feb 2018
Hey, I want to count the lines on the y axis using the variables (A,B,C). Does anyone have a algorithm to do this with Matlab 2015?
Thanks
Jan on 7 Feb 2018
The question is not clear. Which lines on what kind of y axis? And how do 3 variables, especially with the names A,B,C help to solve this?

abuzer on 7 Feb 2018
hi, Convert your data to binary image, and than you can count edges.
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Jan on 14 Feb 2018
@Eliot: Even if you do it automatically, the question is still not clear.

Eliot Sperling on 15 Feb 2018
Hey, I have three variables, A, B, C. each variable is a long list of numbers on Excel. If I plot these variables, they have let's say four y axis lines, the lines go up on the y axis. do you know a algorithm that automatically out the vertical y axis lines and then display it. Example, x=4 if there are 4 lines.
Jan on 16 Feb 2018
@Eliot: This is not clear: "each variable is a long list of numbers on Excel". If they are "on Excel", your question is off-topic in a Matlab forum. I assume, that it does not matter, if the "list" (maybe a "vector"?) is "long". But it does matter, what "they have let's say four y axis lines" means. Unfortunately this detail is not explained.

Eliot Sperling on 15 Feb 2018
remember, i have matlab 2015
Jan on 16 Feb 2018
@Eliot: Please do not post information, which helps to understand the question, in the section for answers. Insert the to the original question, where the readers expect to find all required details.

Star Strider on 15 Feb 2018
I still have no idea what you’re asking.
See if one of these works for you:
x = 1:10;
y = rand(1, 10);
figure(1)
plot(x, y)
ytix = get(gca, 'YTick') % Values Of Y-Ticks
ytixnumber = numel(ytix) % Number Of Y-Ticks
figure(2)
plot(x, y)
ytix = get(gca, 'YTick'); % Values Of Y-Ticks
newytix = linspace(min(ytix), max(ytix), 4); % Define New Values For Y-Ticks, Set Number Of Y-Ticks To 4
newytixlabels = regexp(sprintf('%.2f\n',newytix), '\n','split'); % Format New Values For Y-Ticks
set(gca, 'YTick',newytix, 'YTickLabel',newytixlabels(1:end-1)) % Set New Values & Labels For Y-Ticks