Can you make this source accept a variable declaration

Question

Isaiah Slemons 2019-5-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/464816-can-you-make-this-source-accept-a-variable-declaration

回答： Walter Roberson 2019-5-30

I'm using a community add-on called scatterbar3 and I need to be able to call it a variable but the way the source is written it's currently unable to do that. Thanks in advance.

Source:

function scatterbar3(X,Y,Z,width) % Original
% function var = scatterbar3(X,Y,Z,width) What I'd like to be able to do.
[r,c]=size(Z);
for j=1:r,
    for k=1:c,
        if ~isnan(Z(j,k))
            drawbar(X(j,k),Y(j,k),Z(j,k),width/2)
        end
    end
end
zlim=[min(Z(:)) max(Z(:))];
if zlim(1)>0,zlim(1)=0;end
if zlim(2)<0,zlim(2)=0;end
axis([min(X(:))-width max(X(:))+width min(Y(:))-width max(Y(:))+width zlim])
caxis([0 50])
function drawbar(x,y,z,width)
h(1)=patch([-width -width width width]+x,[-width width width -width]+y,[0 0 0 0],'b');
h(2)=patch(width.*[-1 -1 1 1]+x,width.*[-1 -1 -1 -1]+y,z.*[0 1 1 0],'b');
h(3)=patch(width.*[-1 -1 -1 -1]+x,width.*[-1 -1 1 1]+y,z.*[0 1 1 0],'b');
h(4)=patch([-width -width width width]+x,[-width width width -width]+y,[z z z z],'b');
h(5)=patch(width.*[-1 -1 1 1]+x,width.*[1 1 1 1]+y,z.*[0 1 1 0],'b');
h(6)=patch(width.*[1 1 1 1]+x,width.*[-1 -1 1 1]+y,z.*[0 1 1 0],'b');
set(h,'facecolor','flat','FaceVertexCData',z)

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dpb 2019-5-30

编辑：dpb 2019-5-30

Well, what do you want it to return? You can have it return whatever you want but it's your call as to what that should be.

What would you intend to do with the return value(s) if you had it(them)?

Isaiah Slemons 2019-5-30

I want it to return a variable to me that I can set to User Data inside of a struct. I basically want to be able to turn the bar plot on and off.

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Answer 1

Walter Roberson 2019-5-30

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/464816-can-you-make-this-source-accept-a-variable-declaration#answer_377277

在 MATLAB Online 中打开

function all_h = scatterbar3(X,Y,Z,width) % Original
    [r,c]=size(Z);
    all_h = gobjects(r, c, 6);
    
    for j=1:r,
        for k=1:c,
            if ~isnan(Z(j,k))
                all_h(j, k, :) = drawbar(X(j,k),Y(j,k),Z(j,k),width/2)
            end
        end
    end
    zlim=[min(Z(:)) max(Z(:))];
    if zlim(1)>0,zlim(1)=0;end
    if zlim(2)<0,zlim(2)=0;end
    axis([min(X(:))-width max(X(:))+width min(Y(:))-width max(Y(:))+width zlim])
    caxis([0 50])
function h = drawbar(x,y,z,width)
    h(1)=patch([-width -width width width]+x,[-width width width -width]+y,[0 0 0 0],'b');
    h(2)=patch(width.*[-1 -1 1 1]+x,width.*[-1 -1 -1 -1]+y,z.*[0 1 1 0],'b');
    h(3)=patch(width.*[-1 -1 -1 -1]+x,width.*[-1 -1 1 1]+y,z.*[0 1 1 0],'b');
    h(4)=patch([-width -width width width]+x,[-width width width -width]+y,[z z z z],'b');
    h(5)=patch(width.*[-1 -1 1 1]+x,width.*[1 1 1 1]+y,z.*[0 1 1 0],'b');
    h(6)=patch(width.*[1 1 1 1]+x,width.*[-1 -1 1 1]+y,z.*[0 1 1 0],'b');
    set(h,'facecolor','flat','FaceVertexCData',z)

However, since you do not draw bars for nan values, there will be locations where the placeholder graphics objects will not be overwritten with patch objects, so you cannot just blindly set(all_h, 'visible', 'off')

Note that the code is inefficient and should ideally only draw a single patch object per invocation of drawbar.