convert matlab results into a format useful for Qgis

I have a series of matrices which are the result of various operations and I have a graph produced with the contourf function which must be exported and used in Qgis. the values that I have obtained and that are visible on the graph must be georeferenced and inserted into Qgis with a DEM. How do you export the matlab files in shapefile format that can be used in Qgis? is there any further way to use these matlab results on qgis?

Can anyone help me?

[KSSV]

Read about shapewrite. But why uou want to make contour in MATLAB? you have that option even in QGis.

[ELISABETTA BILLOTTA]

i tried to write

contourf(XX,YY,ZZ,100,'linecolor','none'); 
qgis1=contourf(XX,YY,ZZ,100,'linecolor','none'); 
shapewrite(qgis1,'contour_ves5km.shp');

but it doesn't work.

Do you have a solution?

[ELISABETTA BILLOTTA]

there is this error:

Error using shapewrite

Expected input number 1, S, to be one of these types:

struct, table, mappoint, geopoint, mapshape, geoshape

Instead its type was double.

[Victor Hormazábal Valderrama]

Hi ELISABETTA. Did you find a solution for this?

Answer 1

[Pavan Sahith]

Hello,

I understand you want to transform MATLAB files to shapefile which can be used in QGIS.

Please refer to the following similar MATLAB answers, which will help you in solving your error.

How can I export a MATLAB contour as a polygon shapefile?

https://in.mathworks.com/matlabcentral/answers/358316

How to Export Contour Plot as Shape File if Output is of Data Type 'Double'?

https://in.mathworks.com/matlabcentral/answers/501694

Hope this helps

Thanks & Regards,

Pavan Sahith