specifying the horizontal linetype '_' produces an error.

scatter3(x,y,z,'_')

produces:

Error using scatter3 (line 45)

Invalid color or line sytle.

Answer 1

[Steven Lord]

The horizontal and vertical line markers for plots were introduced in release R2020b. If you're using an older release you will not be able to use them.

[Bruce Wayne]

This must be it.

I am using R2020a

[madhan ravi]

If you want to use 2020b version instantaneously, just use MATLAB Online.

[Adam Danz]

Steven Lord's answer inspired me to write a Community Highlights post about these two new marker symbols.

https://www.mathworks.com/matlabcentral/discussions/highlights/133207-new-in-r2020b-two-new-marker-symbols

Answer 2

[Star Strider]

Function arguments in MATLAB are positional, so it is necessary to provide values for the interventing arguments to use later arguments.

This plots red horizontal lines at the appropriate places:

scatter3(x,y,z,[],'r','_')

.

[Bruce Wayne]

Positioning does not change the error. Something is wrong with the markertype options within my MATLAB sowftware. The horizontal and vertical markertype options are producing errors.

For example, the following commands work:

scatter3(x,y,z,'+')

scatter3(x,y,z,'*')

scatter3(x,y,z,'x')

scatter3(x,y,z,'.')

however, the following two produce an error:

scatter3(x,y,z,'_')

scatter3(x,y,z,'|')

[Star Strider]

The code I posted works correctly in R202b.

So does this:

figure
plot3(x,y,z,'_r') 
grid

producing the same as the scatter3 call.

What version of MATLAB are you using? The online documentation is for R2020b, and may not be appropriate (or accurate) for all earlier versions.

Answer 3

[Walter Roberson]

https://www.mathworks.com/help/matlab/ref/linespec.html

horizontal line style is '-' not '_'

[Bruce Wayne]

see marker types

https://www.mathworks.com/help/matlab/ref/linespec.html

'_'Horizontal line

'|'Vertical line

horizontal line marker type is '_' not '-' !

[Star Strider]

The '_' was new to me too. It may be new in R2020b. See markertype in the current (2020b) online documentation.