How to make input points into a double array?

Question

CD11 2020-7-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/569178-how-to-make-input-points-into-a-double-array

评论： CD11 2020-8-28

I am using a local file called aMaSiNe to analyze images as a test run. The code is running well, but I keep getting a notification that "the input points must be a double array." I'm not sure how to adjust this. I'll attach the error and code below for reference. Any help would be much appreciated. Thanks.

Error using alphaShape/inShape

The input points must be a double array.

Error in STEP_5_Transform_and_ROI_drawing (line 374)

out_bnd=inShape(out_bnd_alpha,cell_detected_all(:,2),cell_detected_all(:,1));

Code:

%%% detect cells across the whole slice image

cell_detected_all = round([cell_warped_x, cell_warped_y]);

if ~isempty(cell_detected_all)

out_bnd_alpha = ref_boundarypad_0809_step5( img_warped_no_scale, xy_pix/xy_pix_resc_factor );

out_bnd=inShape(out_bnd_alpha,cell_detected_all(:,2),cell_detected_all(:,1));

cell_detected_all=cell_detected_all(~out_bnd,:);

end

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Answer 1

Raunak Gupta 2020-8-12

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https://ww2.mathworks.cn/matlabcentral/answers/569178-how-to-make-input-points-into-a-double-array#answer_478857

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Hi David,

The inShape works only for numeric data type double-precision and I guess the cell_detected_all is not present in double format. So, you can convert to double array as follows.

cell_detected_all = round([cell_warped_x, cell_warped_y]); 
                 
if ~isempty(cell_detected_all) 
    out_bnd_alpha = ref_boundarypad_0809_step5( img_warped_no_scale, xy_pix/xy_pix_resc_factor ); 
    out_bnd=inShape(out_bnd_alpha,double(cell_detected_all(:,2)),double(cell_detected_all(:,1))); 
    cell_detected_all=cell_detected_all(~out_bnd,:); 
end 