plotting data with label in 4th column

Hi,

I have a data that looks like this (snippet) -

104.000000 128.599991 3876.100211 1921

98.199997 135.800003 2103.948191 1922

132.299988 135.199997 6265.961561 1923

I have made a heat map of this data using X Y and Z columns. I would now like to label only the points that fall in a certain region of the heat map. The labels may be taken from the 4th column. I have attached the heat map. Can someone please help me with this..

[KSSV]

Label in the sense? What you are expecting at those range points?

[Sahithya S Iyer]

For instance in the image attached the plot is "labeled" with x and y co-ordinates. Similarly I want to label only the dark colored points with values appearing on the 4th column.

Basically I want to know the identity of only those points (in terms of values in the 4th column) that are darkly colored.

[Walter Roberson]

Which heatmap routine are you using? Knowing that might make it easier to figure out which points are "darkly colored"

Answer 1

[Walter Roberson]

For example,

mask = (X >= 50 & X <= 100) & (Y < 50 | Y > 250);
xm = X(mask);
ym = Y(mask);
Lm = cellstr( int2str(Labels(mask)) );
text(xm, ym, Lm);

[Sahithya S Iyer]

Thanks ! This works beautifully !