A null assignment can have only one non-colon index.

78 次查看（过去 30 天）
Sandhiya Prakash
Sandhiya Prakash 2017-3-14
回答： Arpan Bhowmik 2019-2-20
My code is
  • for I=2:160
  • for J=2:216
  • for K=2:176
  • conventional = data(I-1:I+1, J-1:J+1, K-1:K+1);
  • mean_conventional = mean2(conventional);
  • unconventional = conventional;
  • unconventional(2,2,2) = []; %center point not included in mean
  • mean_unconventional = mean2(unconventional);
  • end
  • end
  • end
Error is A null assignment can have only one non-colon index.

请先登录，再回答此问题。

回答（1 个）

Arpan Bhowmik
Arpan Bhowmik 2019-2-20
Given that you have a 3D array in unconventional (based on you calling (2,2,2) the center point), that means you have a 3X3X3 array from which you are trying to delete the center point. This will leave a hole when you do a null assignment and your array will have mismatched dimensions (you cannot stitch a vector with 3 elements with one containing 2 to create a 3X2 or 2X3 aray). Try instead assigning with 0 or nan, based on what you are trying to do in mean2.

类别

在 Help Center 和 File Exchange 中查找有关 Matrices and Arrays 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by