Conditional plotting for a dataset?

I would like to make a plot of data where the date is on the x-axis and air concentrations values are in the y-axis. But, I only want to plot the air concentrations that are greater than 0.07. How would I do this?

Thank you.

[Osama Hussein]

Let's store air concentrations in vector "c".. Then

plot(data(c>0.07),c(c>0.07))

[Walter Roberson]

This will join across the gaps.

[Osama Hussein]

Yes, you are correct. Thank you.

[Navonil Sarkar]

I want to plot x (independent variable) vs y only for integral values of x in a discrete function! How can this be done?

[Walter Roberson]

temp = x;
temp(mod(temp, 1)~=0) = nan;
plot(temp, y)

Answer 1

[Walter Roberson]

temp = concentration;
temp(temp <= 0.07) = nan;
plot(time, temp)