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$\begingroup$I gave my +1 long ago, but can you update us now that it has been 6+ months since you asked this question? Have you found the answer? Are you still actively in need of an answer?$\endgroup$
$\begingroup$I took a line cut at the desired y coordinate and then found Ex variation in it , similarly I took another line cut at particular x coordinate and then found the Ey variation along the lines , thank you the issue was solved . Still if there is any better way to do this please mention. :)$\endgroup$