How to remove indexed set of rows from a cell array

i have a cell array "corb " = 10×5 cell array

1- first question :

i want to find the indexes of all elements in the first column , 100000< element <300000

i tried this it doesn't work : row_indices = find(cell2mat(corb(:,1))>100000 & corb(:,1))<300000)

2- Second question :

once i have the vector containing row indexes values lets say its V=[ 3;5;10]

I would like to create a new cell array that has all of the rows from the original cell array EXCEPT for the rows specified by V. ( remove those rows).

so how to proceed

Answer 1

[the cyclist]

% Identify rows
row_indices = find(cell2mat(corb(:,1))>100000  & cell2mat(corb(:,1))<300000);

% Define new array that is the same as corb, but and remove rows
corb2 = corb;
corb2(row_indices,:) = [];

Answer 2

[Wan Ji]

Try this

logical_indices = arrayfun(@(i)corb{i,1}(1)>100000&corb{i,1}(1)<300000,(1:1:size(corb))');
row_indices = find(logical_indices); % actually this line can be deleted to save time
corb2 = corb(~logical_indices,:); % this is what you want