How to modify an Eigen::Matrix row passed to a ceres cost function?

[ellat]

Hello,

I have a matrix defined as follows:

Eigen::Matrix<double, Eigen::Dynamic, Eigen::dynamic, Eigen::RowMajor > newEigenMat;

I am passing it row by row to a Ceres cost function. The value I pass is:

newEigenMat.row(i).data()

I would like to modify this row from within the Ceres cost function. If I try to access it as a normal Eigen vector like so:

inputRow(i) = val;

Ceres gives me the error:

inputRow cannot be used as a function.

How can I do it correctly please?

[Sameer Agarwal]

Ellat,

It is hard to tell what you are doing without seeing a fragment of example code.

Sameer

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