plot and ignore certain values

I have a vector I need to plot that contains numerics gathered from a data acquisition board collecting at 1 hz (1 point / sec).

any time signal is lost, a placeholder "-1" value is used in that cell and I need to plot this vector but not have it plot the "-1"s

is the plot function capable of such a task? or do I have to remove all the "-1"s first?

[Nathaniel Menefee]

So i want to do that same thing but i want to do it with 2 different plots. is there any way to do this.

Answer 1

[Wayne King]

You can set those values to NaN

    x(x == -1) = NaN;
    plot(x)

They will show up as gaps in your plot.

[David C]

bingo, logical indexing saves the day! Thanks Wayne!

[Samuel Bartlett]

THANK YOU SO MUCH!!! This saved my life!

Answer 2

[Wayne King]

You can just plot x for x~= -1 or did you mean that the character array "-1" is entered? Not sure what you mean by the " ".

x = randi([-1 4],20,1);
plot(x(x~= -1))

[David C]

almost did the trick

your code stitched the gaps together for the areas where -1 was present, but I would like for it to leave the gaps present!

Thank you!