how to convert from probabilty to occupancy grid message

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Dears i am trying to create an occupancy grid message, so for that i have some float data represent the probability, I used std_msgs::Float32MultiArray with data[] field =

[1.0, 10.0, 0.10000000149011612, 3.0, 9.0, 0.20000000298023224, 3.0, 10.0, 0.1666666716337204, 4.0, 9.0, 0.23333333432674408, 6.0, 8.0, 0.2666666805744171, 6.0, 9.0, 0.03333333507180214]

as an example to represent that probability,where the first value "1.0" represent the height, the second value "10" represent the width and the third value represent the probability at that (1.0,10) cell, and so on for other values, i publish this message and in another node i create nav_msgs::OccupancyGrid grid_message with these info

    grid_message.info.height = 20;
    grid_message.info.width = 20;
    grid_message.info.resolution = 0.2;

and i use msg->data[y]*width + msg->data[x] to fill the data field of the occupancyGrid message, for example, at cell(1,10) the corresponding nav_msgs::OccupancyGrid.data index is (10*20+1) and in this index i store 0.10000000149011612 when i listen to the occupancyGrid message the data in nav_msgs::OccupancyGrid.data look like

data: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 14, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 11, 0, 17, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ...