Plot markers as a continuous line

Hi there, I am trying to plot lots of points representing a seismic fault over some topography. I am plotting the data in the form plot(x,y,'.') but as the data represnets a shape I need the gaps between each of the points filling so it looks like a smooth line.

plotting in the form plot(x,y'-') is very messy.

Any ides on how to fix this?

[Adam]

What do you want it to look like that is different from using plot(x,y,'-')? What is messy about it? Can you post an image?

[P_L]

Hi Adam, I want to plot the coordinates in my fault as a smooth line. If i plot them as points- the markers are too sparse. If I plot them using '-' they look messy like this (please see attached image) .

Many thanks!

[Adam]

And do you have an example of the points? I know you can get a mess sometimes with line plots, but only usually if the points are in a jumbled order. If they are in the order you want them to be joined they should normally be joined as you would expect them. Are your points sorted in y? I assume if it is a seismic fault that y-values should be monotonically increasing?

[P_L]

Hi Adam thanks for getting back to me. They were in decending order and now i have just tried it by placing them in ascending order - but still no luck :(

Answer 1

[Kevin Phung]

try this :

[new_x, ord] = sort(x);
new_y = y(ord);
plot(new_x,new_y,'r-')

let me know if this helped

[P_L]

Hi Kevin, nope! looks like rain now :(.

Many Thanks

[Kevin Phung]

To be able to help, I think you need to provide in what order you need the data to be in, and in what order they currently are because the plot function plots each marker and draws a line through them in the order that you plot it.

[Walter Roberson]

You posted a question about splitting your data; I have responded to it a second ago.

[P_L]

Hi Walter thank you, yes i posted that comment over an hour ago. I have deleted it now as it has been resolved :)

Answer 2

[Image Analyst]

Don't use the dash line specifier because it looks like you might be plotting one 2-D array and the ends of one line are connecting to the beginning of the next line.

Just use dot and the MarkerSize property and see if that works for you.

plot(x, y, 'b.', 'MarkerSize', 10);

Adjust color and MarkerSize as needed.

If it's a 2-D array you're plotting, consider plotting each row or column one at a time rather than the 2-D matrix all with one call to plot().

[P_L]

Hi there, I already tried increasing the marker size but the gaps in data points are too big. I also tried your secong suggestion which I couldn't get to work earlier. The fault data I have read in for a collection of faults which is why I believe it's behaving the way it is. I have now seperated the data into seperate vectors and and I amtrying to plot it this way.

Thank you for your imput anyway, much appreciated :)