MATLAB: New to Matlab, where is the best place to start learning how to program in Matlab

programmingsolar

Starting my third year project and need some help where to start.The project involves writing a program in Matlab to produce a simulation of the positioning of the sun from a solar panel. Any feedback would be much appreciated.

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Start by searching File Exchange

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MATLAB: How to place a legend in best corner

Give this a try as a first cut...written for a one-line plot as is and takes the legend, axis handles.

Generalized, it could handle simply a figure handle and find the axes and legend from it and retrieve all the X,YData.

But, illustrates the logic idea of above; seemed to work here for a test case where drew the legend on a line and then moved the legend to not clash, but that's the extent of testing.

function flag=legendclash(hAx,hLg,x,y)
% Returns T if data in line x,y cross legend box in axes hAx
AxPosn=hAx.Position;                       % get axis position vector
Axbot=AxPosn(2); Axtop=Axbot+AxPosn(4);    % compute bounding box
Axlft=AxPosn(1); Axrgt=Axlft+AxPosn(3);    % dimensions for axis
LgPosn=hLg.Position;                       % and same for the legend
LGbot=LgPosn(2); LGtop=LGbot+LgPosn(4);
LGlft=LgPosn(1); LGrgt=LGlft+LgPosn(3);
if strfind(hAx.YDir,'normal')
  yscaled=interp1(hAx.YLim,[Axbot Axtop],y); % compute scaled plotted values

else
  yscaled=interp1(hAx.YLim,[Axtop Axbot],y); % compute scaled plotted values
end
if strfind(hAx.XDir,'normal')
  xscaled=interp1(hAx.xlim,[Axlft Axrgt],x); % in the axis bounding box

else
  xscaled=interp1(hAx.xlim,[Axrgt Axlft],x); % in the axis bounding box
end
% test if data intersects inside the legend bounding box
flag=any(iswithin(yscaled(:),LGbot,LGtop) & iswithin(xscaled(:),LGlft,LGrgt));
end

iswithin is my oft-used utlity function that is just "syntax sugar" but makes for simpler high-level code...

function flg=iswithin(x,lo,hi)
% returns T for values within range of input
% SYNTAX:
%  [log] = iswithin(x,lo,hi)
%      returns T for x between lo and hi values, inclusive
  flg= (x>=lo) & (x<=hi);

NOTA BENE: ERRATUM

Corrected swapped indices in axis position calculation and inserted missing function keyword

ADDENDUM

Added logic to handle reversed axes

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