How to erase a data point in plotting

Hi, there is a false data point at [500,0] that I want to remove

I thought of using

([500,0],:)=[]

but not quite sure how to get it working or if a different method is better.

%current plot

pline=plot([Trend]+231,[Trend.count]-Trend.mean, '-s')

[Abderrahim. B]

Hi!

What do you mean by ereas in plottinge?

You just do not want to see it on the plot!

Or you want to replace it with some value?

Or you wan to remove it from the data then plot ?

[Emily]

I would perfer to remove it from the data, then plot.

But if that's not possible, am ok with just not seeing it on the plot.

[Abderrahim. B]

To delete an element from an array use [ ].

A = [100 1 2 3 5 3 6 6] ;
plot(1:length(A), A, 'r')

A(1) = [] 

A = 1×7

1 2 3 5 3 6 6

plot(1:length(A), A)

Answer 1

[Star Strider]

There are several ways to do this, the most obvious being —

x = 0 : 100: 1000;                                  % Create Data — 'x' Is Actually 'Trend+231'
y = randn(size(x));                                 % Create Data — 'y' Is Actually 'Trend.count-Trend.mean'
y(6) = 0;                                           % Create Data — Define Point

figure
plot(x, y, '.-')

idx = find((x == 500) & (y == 0));
x(idx) = [];
y(idx) = [];

figure
plot(x, y, '.-')

This assumes there could be several values at ‘x=500’ so it eliminates only the 0 value. If there is only one value at that point, it would only be necessary to test for ‘x==500’.

.