Can't convert the Array to this TypedArray
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Hi the mathworks community,
I have a quiet anoying problem with matlab C++ engine more precisely the matlab::data::TypedArray. I have wrote my C++ and matlab codes and compiled them successfully But I run the executable I got this:
terminate called after throwing an instance of 'matlab::data::detail::ArrayException<matlab::Exception, (matlab::data::ExceptionType)9>'
what(): Can't convert the Array to this TypedArray
Aborted (core dumped)
~I think that it occurs at the first line where I use matlab::data::TypedArray dataType:~
matlab::data::TypedArray<double> weedUV = factory.createArray<double>(
{ 1, 2 }, { 117.0, 91.0 });
And I found that pretty weird since I saw tons of example using exactly the same line. I URGENTLY NEED HELP GUYS!
Here is the entire C++ code:
#include "MatlabDataArray.hpp"
#include "MatlabEngine.hpp"
#include <iostream>
void client(matlab::engine::MATLABEngine* matlabPtr) {
// Create MATLAB data array factory
matlab::data::ArrayFactory factory;
// Define the input arguments
matlab::data::TypedArray<double> weedUV = factory.createArray<double>(
{ 1, 2 }, { 117.0, 91.0 }); //weedUV[0], weedUV[1]
matlab::data::TypedArray<double> orientation = factory.createArray<double>(
{ 1, 4 }, { 0.1445, 0.784, 0.712, 0.456 }); //orientation.w, orientation.x, orientation.y, orientation.z
matlab::data::TypedArray<double> robotPosition = factory.createArray<double>(
{ 1, 2 }, { 5.947123, 2.1457 }); // robotPosition[0], robotPosition[1]
matlab::data::CharArray cameraFrame = factory.createScalar("right_camera");
//Define the projection Matrix
matlab::data::TypedArray<double> const projectionMatrix = factory.createArray<double>(
{ 3, 4 }, {
245.6983, 0.0, 318.6139, 0.0,
0.0, 253.3011, 243.9297, 0.0,
0.0, 0.0, 1.0, 0.0
});
// Pass vector containing 2 scalar args in vector
std::vector<matlab::data::Array> args({
weedUV,
orientation,
robotPosition,
projectionMatrix,
cameraFrame});
// Call the MATLAB function
std::cout << "calling the api function" << std::endl;
matlab::data::TypedArray<double> points = matlabPtr->feval(u"api", args);
double x = points[0];
double y = points[1];
// Display results
std::cout << "x: " << x << ", y: " << y << std::endl;
}
int main() {
using namespace matlab::engine;
// Start MATLAB engine synchronously
std::unique_ptr<matlab::engine::MATLABEngine> matlabPtr = matlab::engine::startMATLAB();
matlabPtr->eval(u"rosshutdown;");
matlabPtr->eval(u"rosinit;");
// Call the client function with the MATLAB engine pointer
client(matlabPtr.get());
matlabPtr->eval(u"rosshutdown;");
return 0;
}
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更多回答（1 个）
Ayush Kashyap
2023-7-10
Hi Sanogo,
Seeing the line of code, I believe it can be an issue of datatype of size.
You may try as following:
std::vector<size_t> size = {1, 2};
std::vector<double> data = {117.0, 91.0};
matlab::data::TypedArray<double> weedUV = factory.createArray<double>(size, data ...);
Using size_t datatype for defining size should resolve the error.
If the problem still persists, do check if appropriate libraries are lined properly or not, especially the one necessary for MATLAB Engine.
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