# MATLAB: Do I get this error

rectangular empty matrix

I get this error in the third line
"Improper assignment with rectangular empty matrix."
When I run this code
handles = guidata(hObject);    for j = 1:1:length(handles.cycleList)        maxStrain(j) = max(handles.graphEpsilon(handles.newHighPoints(j)+1:handles.newHighPoints(j+1)));        minStrain(j) = min(handles.graphEpsilon(handles.newHighPoints(j)+1:handles.newHighPoints(j+1)));    end
The length of cycleList is 740. The length of handles.newHighPoints is 778. I read several other forums but could not figure it out. Why am I getting this error?

• My guess is that:
handles.newHighPoints(j)+1
is greater than:
handles.newHighPoints(j+1)
so the colon operator evaluates this as an empty vector (it will not decrement unless you tell it to), and the matrix evaluates as empty.
Consider:
v  = 2:1
evaluates to:
v =   Empty matrix: 1-by-0