R - 尝试使用热图来制作矩阵的热图（矩阵中的所有值都相同）

I trying to use heatmap.2 to make a heatmap from matrix. My problem is that I am using it inside a loop and once in a while all of the values in the matrix are the same (e.g. all of the values are zeros) and I get the error message: "Error in axis(1, at = xv, labels = lv) : no locations are finite"I trying to use heatmap.2 to make a heatmap fro