Function expr_batch_set_variable 

#[unsafe(no_mangle)]
pub extern "C" fn expr_batch_set_variable(
    batch: *mut ExprBatch,
    index: usize,
    value: Real,
) -> i32

Update a variable value by index

Parameters

• batch: The batch
• index: Variable index from expr_batch_add_variable()
• value: New value

Returns

0 on success, negative error code on failure